WASHINGTON — President Donald Trump threatened a slew of aggressive actions to curtail legal migration to the U.S. in response to one National Guard member dying after being ambushed near the White House, though the scope of those moves and what legal or congressional mechanisms he may pursue remain unclear.

Trump, who has amplified his anti-immigration rhetoric in the wake of the shooting attack by an Afghan national, said late Thursday he would permanently pause migration from “all Third World Countries,” “terminate” what he called “illegal admissions” under former President Joe Biden and end federal benefits for non-citizens. The president also said he would deport foreign nationals deemed a security risk and “denaturalize migrants who undermine domestic tranquility.”

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