What We Know About the Detentions of Student Protesters

The Trump administration is trying to deport pro-Palestinian students and academics who are legally in the United States, a new front in its clash with elite schools over what it says is their failure to combat antisemitism.

The White House asserts that these moves — many of which involve immigrants with visas and green cards — are necessary because those taken into custody threaten national security. But some legal experts say that the administration is trampling on free speech rights and using lower-level laws to crack down on activism.

Secretary of State Marco Rubio said on Thursday that the State Department under his direction had revoked the visas of more than 300 people and was continuing to revoke visas daily. He did not specify how many of those people had taken part in campus protests or acted to support Palestinians.

Mr. Rubio gave that number at a news conference, after noting that the department had revoked the visa of a Turkish graduate student at Tufts University. He did not give details on the other revocations.

Immigration officials are known to have pursued at least nine people in apparent connection to this effort since the start of March.

The detentions and efforts to deport people who are in the country legally reflect an escalation of the administration’s efforts to restrict immigration, as it also seeks to deport undocumented immigrants en masse.