Montana’s junior senator has thrown his support behind the Trump administration’s push to end birthright citizenship.

Montana Public Radio | By Shaylee Ragar, published 02/05/26, at 5:29 pm, shaylee.ragar@mso.umt.edu.

President Donald Trump’s executive order redefining citizenship was challenged and is now before the U.S. Supreme Court. U.S. Sen. Tim Sheehy [pictured here] signed on to a brief supporting the administration’s policy.

Trump’s order relies on a narrow application of the U.S. Constitution’s citizenship clause. It would end automatic citizenship for children of parents who are unlawfully or temporarily in the country. The administration argues such parents are not subject to U.S. jurisdiction.

Supreme Court Takes Up Trump’s Birthright Citizenship Order in Historic Showdown

The battle over who qualifies as an American at birth has officially reached the highest court in the land.

On Friday, the U.S. Supreme Court heard oral arguments in the historic challenge to President Donald Trump’s 2025 executive order restricting birthright citizenship, setting the stage for what could be the most consequential interpretation of the 14th Amendment in more than a century.

Trump’s order—one of the signature actions of his America First immigration agenda—asserts that children born to illegal aliens on U.S. soil do not automatically receive citizenship, countering decades of bureaucratic interpretation and closing what critics call one of the most abused loopholes in American law.