Sen. Jim Banks of Indiana is not waiting for the next Supreme Court showdown. Days after Justice Brett Kavanaugh handed Congress a legal opening on birthright citizenship, Banks filed legislation designed to walk straight through it.
The bill, titled the Citizenship Act, would amend the Immigration and Nationality Act to exclude children born in the United States to parents who entered the country illegally or traveled here specifically to give birth. Banks crafted the measure as a direct response to Kavanaugh's concurrence in Trump v. Barbara, the case that struck down President Trump's executive order on birthright citizenship but left a door open for Congress to act through statute.
The political and legal stakes are enormous. If the bill advances, it would mark the first serious legislative attempt to narrow birthright citizenship without amending the Fourteenth Amendment, a path many constitutional scholars have long called the only viable route. Kavanaugh's concurrence changed that calculus overnight, and Banks wants to move before the window closes.
Kavanaugh sided with the majority in striking down Trump's executive order, concluding that the order conflicted with existing federal birthright citizenship law. But his concurrence went further than the majority opinion required. As Just the News reported, Kavanaugh explicitly suggested that Congress could amend federal birthright citizenship law to create new exceptions, a suggestion that amounted to a blueprint for legislative action.
That distinction matters. The executive order failed because the president tried to rewrite statutory law on his own. Kavanaugh's concurrence said the problem was the method, not the goal. Congress, he indicated, holds the power to define who qualifies for citizenship at birth under federal statute.
Banks seized on that reasoning. His bill would classify children born to unauthorized immigrants and birth tourists as children of "invaders" under federal law, a category that would fall outside statutory birthright citizenship protections. The approach sidesteps the constitutional amendment process entirely, relying instead on Congress's authority over immigration law.
Kavanaugh's willingness to chart an independent course on the bench is not new. He has previously sided with liberal justices in cases where he believed the law demanded it, a pattern that frustrates ideological scorekeeping but has given his concurrences unusual weight with lawmakers on both sides.
The bill targets two groups: children born to parents who entered the United States without authorization and children born to so-called birth tourists, foreign nationals who travel to the U.S. specifically to give birth on American soil. Under current law, virtually all children born on U.S. territory receive citizenship automatically, regardless of their parents' immigration status.
Banks's legislation would amend the Immigration and Nationality Act to strip that automatic grant for those two categories. The mechanism is the "invaders" classification. By defining unauthorized entrants and birth tourists as invaders under federal statute, the bill would remove their children from the scope of birthright citizenship as a matter of statutory interpretation.
The legal theory rests on the idea that Congress can narrow the statutory definition of who is "subject to the jurisdiction" of the United States at birth, a phrase drawn from the Fourteenth Amendment but implemented through federal immigration law. Kavanaugh's concurrence suggested that Congress has room to maneuver within that statutory framework, even if the constitutional text itself remains unchanged.
Banks made clear he views the Supreme Court's decision striking down Trump's executive order as a threat to national sovereignty, not merely a procedural setback. Fox News reported his statement upon introducing the bill:
"The Supreme Court's birthright citizenship decision was an unprecedented assault on American sovereignty, and we must do whatever it takes to save our country."
That language signals Banks intends to frame the bill as a sovereignty measure, not just an immigration tweak. The word "invaders" in the bill text carries the same rhetorical weight. Whether that framing helps or hurts the bill's chances in the Senate remains an open question, but Banks clearly believes the political environment favors aggressive action.
The broader fight over birthright citizenship has been building for years. Trump's executive order was the most direct presidential challenge to the practice in modern history, and its defeat at the Supreme Court could have ended the debate. Instead, Kavanaugh's concurrence revived it on new terms, shifting the battlefield from the White House to Capitol Hill.
Even if the Citizenship Act passes both chambers and receives a presidential signature, it would almost certainly face immediate legal challenge. Opponents would argue that the Fourteenth Amendment's Citizenship Clause is self-executing, meaning no statute can override its guarantee of citizenship to anyone born on U.S. soil and subject to American jurisdiction.
Supporters counter that the phrase "subject to the jurisdiction thereof" has never been definitively interpreted by the Supreme Court to include children of unauthorized immigrants. They point to the 1898 case United States v. Wong Kim Ark, which addressed children of lawful permanent residents, not those present illegally. The argument is that Congress can fill the gap left by that decision through statutory law.
Kavanaugh's concurrence did not resolve this constitutional question. He addressed only whether the president could act unilaterally under existing statute. But by suggesting Congress could create new exceptions, he gave lawmakers a credible legal hook, one that would force the courts to confront the constitutional boundary directly if the statute ever takes effect.
Kavanaugh's record of independent thinking on the bench gives his concurrence added credibility with legal observers who might otherwise dismiss the approach. His authorship of opinions that broke with conservative expectations has made him difficult to pigeonhole, and his willingness to lay out a legislative path in Trump v. Barbara suggests he would take a serious look at any statute Congress produced in response.
The Citizenship Act faces steep odds in the current Senate, where any immigration measure needs to survive both a filibuster and internal Republican divisions over how far to push on citizenship law. Some Republican senators have expressed concern that the "invaders" label could alienate moderate voters or invite accusations of nativism. Others argue the term reflects the reality of mass unauthorized entry and resonates with the base.
In the House, the bill would likely find a warmer reception. Banks served in the House before winning his Senate seat in 2024, and he retains strong relationships with the conservative caucus members who have long pushed for birthright citizenship reform.
The timing is deliberate. Banks introduced the bill while the Trump v. Barbara decision is still fresh and Kavanaugh's concurrence is still generating headlines. The longer Congress waits, the harder it becomes to sustain the political momentum needed to move a bill this controversial through both chambers.
The internal dynamics of the Supreme Court itself add another layer. Kavanaugh's interactions with fellow justices have occasionally produced friction, including a public episode involving Justice Sotomayor that revealed tensions beneath the Court's collegial surface. How those relationships shape future rulings on citizenship law is impossible to predict, but the concurrence in Trump v. Barbara suggests Kavanaugh is willing to stake out ground that invites congressional follow-through.
Banks has not yet announced co-sponsors, and no companion bill has been introduced in the House. The Senate Judiciary Committee would handle initial consideration. Whether Chairman Lindsey Graham schedules a hearing will be an early indicator of the bill's viability.
If the bill stalls, it will still have served a purpose for its backers: establishing a legislative record that Kavanaugh's concurrence was taken seriously by Congress. That record could matter in future litigation, where courts often look at legislative history to gauge whether a statutory interpretation has political support.
For now, the Citizenship Act is a marker. It tells the Supreme Court that at least one senator read Kavanaugh's concurrence not as dicta to be filed away, but as an invitation to act.
When a Supreme Court justice draws a map, someone in Congress will eventually follow it. The only question is whether the votes exist to reach the destination, or whether the map ends up in a drawer.
