A growing political argument is asking a question the Constitution answered more than two centuries ago.

Should Americans who were born outside the United States be allowed to serve in Congress?

For some conservative activists and lawmakers, the answer is increasingly no.

They argue that members of Congress exercise enormous power over national security, foreign policy, immigration, intelligence and federal spending, and that people holding those positions should have an unquestioned allegiance to the United States from birth.

The idea has gained attention as foreign-born political figures have become frequent targets in national political fights.

But before debating whether such a restriction would be good policy, there is a more immediate legal fact.

Congress cannot impose a blanket ban on foreign-born members of the House or Senate through an ordinary federal law.

The Constitution itself allows naturalized citizens to serve in Congress once they satisfy specific citizenship requirements.

And Supreme Court precedent treats those qualifications as exclusive.

So if supporters want to permanently exclude naturalized citizens from Congress, they would have to amend the Constitution.

That is not a technical loophole.

It is the central issue.

Article I sets the qualifications for members of the House directly.

A representative must be at least 25 years old, must have been a U.S. citizen for at least seven years and must be an inhabitant of the state represented at the time of election.

There is no requirement that a representative be a natural-born citizen.

The Senate rule is similar.

A senator must be at least 30 years old, must have been a U.S. citizen for at least nine years and must be an inhabitant of the state represented.

Again, there is no natural-born-citizen requirement.

That is different from the presidency.

Article II requires the president to be a natural-born citizen.

The Twelfth Amendment effectively carries the same presidential eligibility requirement over to the vice presidency.

Congress, by contrast, was deliberately left open to naturalized citizens after a waiting period.

The difference was not accidental.

During the Constitutional Convention, the Framers were well aware of concerns about foreign influence.

English law had excluded people born outside England, Scotland or Ireland from Parliament.

The American delegates did not copy that model.

Instead, they debated how long a naturalized citizen should have to live as an American citizen before becoming eligible for federal legislative office.

For the House, they settled on seven years.

For the Senate, they settled on nine.

The Senate’s own historical account describes the nine-year requirement as a compromise between completely excluding adopted citizens and admitting them too quickly.

The Framers were especially sensitive to foreign influence in the Senate because senators would play a significant role in treaties, diplomacy and other foreign-affairs matters.

But they stopped short of permanent exclusion.

That history matters because the modern proposal would reverse a choice made at the founding.

Supporters are free to argue that the choice should now be changed.

But Congress cannot pretend the current Constitution already contains the restriction.

It does not.

The Supreme Court has also made clear that Congress cannot simply add another qualification by statute.

The first major case was Powell v. McCormack in 1969.

Adam Clayton Powell Jr. had been reelected to the House, but the chamber refused to seat him because of allegations of misconduct.

The Supreme Court held that Congress could not exclude a duly elected member who satisfied the constitutional qualifications by inventing an additional eligibility requirement.

The principle was broader than Powell’s individual dispute.

The constitutional qualifications for congressional service could not simply be supplemented by Congress.

The Court reinforced that principle in U.S. Term Limits, Inc. v. Thornton in 1995.

Arkansas had attempted to impose term limits that would effectively prevent some otherwise qualified candidates from appearing on the ballot for Congress.

The Supreme Court struck the rule down.

The majority concluded that neither Congress nor the states may add qualifications for congressional membership beyond those fixed by the Constitution.

That precedent creates a direct problem for a statute saying that no person born outside the United States may serve in Congress.

Such a rule would add a new qualification.

The Constitution says age, citizenship duration and state inhabitancy.

A birthplace requirement would be a fourth condition.

Under existing Supreme Court doctrine, Congress cannot create that condition by ordinary legislation.

States cannot do it either.

The Constitution would have to change.

Rep. Nancy Mace of South Carolina has already chosen that route.

On May 20, 2026, Mace announced a joint resolution proposing a constitutional amendment that would require representatives, senators, federal judges and Senate-confirmed federal officers to be natural-born citizens.

Her stated argument was straightforward.

People who exercise major federal authority, she said, should have one loyalty: the United States.

That proposal is important because it recognizes the legal reality.

Mace did not introduce an ordinary bill and claim Congress could simply override Article I.

She proposed amending the Constitution itself.

On June 3, she announced a separate proposed constitutional amendment focused on foreign citizenship, nationality or allegiance.

That measure would bar people who retain such foreign ties from serving in Congress, on the federal bench, as president or vice president, or in Senate-confirmed positions unless they formally and permanently sever those ties.

Those are real political proposals.

They are not current law.

Naturalized U.S. citizens remain legally eligible for Congress today if they satisfy Article I.

There is also an important wording problem in the broader debate.

“Foreign-born” and “naturalized citizen” do not mean exactly the same thing.

A person can be born outside the geographic United States and still be a U.S. citizen from birth.

Children born abroad to American parents are the obvious example.

That can include children of military personnel, diplomats, government employees and private citizens living overseas.

So a literal ban on anyone “foreign-born” could sweep more broadly than many voters might realize.

It could exclude someone who never went through naturalization because that person was already an American citizen at birth.

The phrase “natural-born citizen” is therefore more precise for the kind of restriction Mace has proposed.

Even that term has generated legal debate, particularly when applied to people born abroad to American parents.

But the broad legal understanding has generally treated citizenship at birth as different from citizenship acquired later through naturalization.

That means lawmakers would have to draft any amendment carefully.

If the goal is to exclude naturalized citizens, “foreign-born” may be too broad.

If the goal is literally to require birth on U.S. soil, the amendment would need to say that — and it could affect Americans born overseas to American families.

The size of the affected group is not trivial.

A Congressional Research Service profile of the 119th Congress counted 26 representatives and six senators who were born outside the United States.

That was about 6 percent of Congress.

The CRS report also specifically noted that some of those members were born abroad to American parents.

Foreign-born lawmakers have served in Congress since the early years of the republic.

The Senate maintains a historical list that includes members born in Ireland, Scotland, Canada, Germany and many other countries.

So naturalized representation is not a modern loophole created by recent immigration politics.

It is part of the constitutional structure from the beginning.

That history does not answer whether the rule should change.

It does show what would be changed.

The strongest argument for a new restriction is about allegiance.

Members of Congress receive classified information.

They oversee intelligence agencies.

They vote on military funding.

They approve sanctions.

They decide immigration rules.

Senators confirm ambassadors, cabinet officials, senior military officers and federal judges.

Congress can authorize war, regulate international commerce and influence nearly every major area of national security.

Supporters of a natural-born requirement argue that the United States has a legitimate interest in demanding the strongest possible assurance of undivided allegiance from the people exercising that power.

Their concern can become sharper when a public official retains another citizenship or has continuing formal political ties to another country.

Even where no misconduct exists, supporters argue that dual nationality can create an appearance of divided loyalty.

A constitutional amendment would allow Congress and the states to decide that those concerns outweigh the existing principle of equal eligibility for naturalized citizens.

That is a legitimate constitutional argument.

The strongest argument against the restriction begins from a different concept of citizenship.

Naturalization is supposed to make someone an American citizen.

A naturalized citizen takes an oath of allegiance to the United States.

That person can vote.

That person can serve in the military.

That person can pay taxes, own property, serve on juries and participate in American political life.

Opponents ask why citizenship should become permanently second-class when the person seeks elected office.

The Constitution already imposes waiting periods.

A naturalized citizen cannot arrive in the United States, become a citizen and immediately enter Congress.

The House requires seven years of citizenship.

The Senate requires nine.

The Framers chose those waiting periods precisely because they wanted time for attachment to the United States without creating a permanent exclusion.

Critics of a natural-born requirement also argue that birthplace is a poor test of loyalty.

A naturalized citizen who fled communism, religious persecution or dictatorship may have an intense commitment to the United States.

A person born in an American hospital can still commit espionage, corruption or treason.

Birth does not guarantee loyalty.

Conduct is a different matter.

Congress already has tools for actual misconduct.

Each chamber can discipline its members.

With a two-thirds vote, the House or Senate can expel a member.

Federal bribery, espionage, corruption and foreign-agent laws apply to members of Congress.

The Fourteenth Amendment contains a separate disqualification provision involving certain people who previously took an oath to support the Constitution and then engaged in insurrection or rebellion.

Those rules focus on what someone does.

A natural-born requirement would focus instead on a status fixed at birth.

That is why supporters should evaluate the proposal as a permanent constitutional principle rather than as a way to target one current politician.

A constitutional amendment would not say, in effect, “Ilhan Omar cannot serve.”

It would create a rule for every future election.

It would affect Republicans and Democrats.

It could affect refugees from communist governments who later become conservative candidates.

It could affect immigrant entrepreneurs, military veterans, doctors, business leaders and dissidents who become U.S. citizens and then win the trust of voters.

And depending on how the amendment was written, it could potentially reach some Americans born abroad to U.S. parents.

That permanence is what makes the Article V process so difficult.

Congress can propose a constitutional amendment with a two-thirds vote in both the House and Senate.

The amendment then must be ratified by three-fourths of the states.

Article V also provides another route under which two-thirds of state legislatures can apply for a convention to propose amendments, although that method has never been used to produce an amendment.

Either way, the threshold is far higher than passing an ordinary bill.

That is intentional.

Changing who may serve in the national legislature is a structural constitutional decision.

A temporary congressional majority cannot do it alone.

A House majority of 218 votes and a simple Senate majority would not be enough.

Supporters would need a national consensus large enough to clear the amendment process.

There is another possible version of the debate that may be politically easier to defend.

Instead of excluding all naturalized citizens, lawmakers could focus on dual citizenship or continuing foreign allegiance.

Mace’s June proposal moves in that direction.

The argument is that a federal officeholder should not simultaneously maintain formal citizenship in another country.

That is narrower than a natural-born requirement.

It focuses on present legal ties rather than place of birth.

But even that proposal raises complications.

Dual citizenship can arise automatically under foreign law.

A person may receive another nationality at birth without ever applying for it, voting there, holding a foreign passport or considering that country a political home.

Some countries also make renunciation difficult.

So the existence of dual nationality does not necessarily prove divided loyalty.

And for members of Congress, a categorical dual-citizenship disqualification would still add a new qualification beyond Article I.

An ordinary statute would face the same constitutional problem.

An amendment would again be the safer and likely necessary route.

That leads to the larger question in the headline.

Should this become law?

There is no purely legal answer to that policy question.

The Constitution can be amended.

The United States has changed eligibility and political participation rules before.

Voters and states are free to decide that the original seven- and nine-year citizenship rules are no longer sufficient.

Supporters can argue that national-security responsibilities have grown far beyond what the Framers could have imagined and that citizenship from birth should now be required for federal lawmakers.

Opponents can argue that the Framers already confronted the problem of foreign attachment and deliberately rejected permanent exclusion.

They can also argue that naturalized Americans should not carry an irreversible political disability after becoming citizens.

The democratic question is ultimately whether voters should be allowed to make that judgment candidate by candidate.

Under the current system, voters can reject a naturalized candidate if they distrust that person’s loyalty.

They can also elect that person if they find the candidate qualified and committed to the United States.

A natural-born amendment would remove that choice entirely.

That is the tradeoff.

The amendment would create a bright-line national rule.

It would also permanently exclude a class of American citizens from Congress regardless of their record, military service, years in the country or support among voters.

People can reasonably disagree over whether that is desirable.

What is much less debatable is the current law.

Foreign-born naturalized citizens are constitutionally eligible for the House after seven years of U.S. citizenship.

They are constitutionally eligible for the Senate after nine years.

Article I does not contain a natural-born requirement.

The Framers considered concerns about foreign influence and chose waiting periods instead of permanent exclusion.

Powell v. McCormack established that Congress cannot add new qualifications for members who meet the constitutional requirements.

U.S. Term Limits v. Thornton reinforced that those qualifications cannot be augmented by state law and that changing them requires the constitutional amendment process.

Nancy Mace’s 2026 proposal therefore uses the legally appropriate vehicle.

It is a proposed constitutional amendment, not an ordinary statute.

And the difference between “foreign-born” and “naturalized” matters because some Americans born overseas are citizens from birth.

The debate can continue.

Congress can propose an amendment.

States can decide whether to ratify it.

Voters can argue about allegiance, equality, immigration and national power.

But the legal bottom line comes first.

A nationwide ban on foreign-born or naturalized members of Congress cannot simply become “the next law.”