Chip Roy unveils 'MAMDANI Act' to bar migrants over ideology

On 2026-04-20, Rep. Chip Roy announced he was preparing to introduce the “MAMDANI Act,” a bill that would expand U.S. immigration grounds to bar entry, naturalization, and permit deportation of people tied to certain political or ideological movements. The proposal was framed as a response to Marxism and Islamic fundamentalism, and Roy said it would create new tools under immigration law.