Joining nationwide protests against Trump administration, University of Texas students gathered to rally in support of migrant rights and free speech.

Railing against “tax breaks for billionaires” and issuing a warning to Pennsylvania lawmakers, Sen. Bernie Sanders delivered a firebrand speech Thursday afternoon to a crowd clustered outside City Hall.

Trump has made sweeping changes to the country’s immigration system. Some of his controversial moves include deporting American citizens hailing from mixed families, deporting a child with Stage 4 cancer, and incarcerating immigrants at a notorious mega-prison in El Salvador.