A Canadian is fighting back in U.S. federal court over what he says is an attempt by the Department of Homeland Security, through Google, to seek “vast swaths of information” about his personal life following social media posts critical of Donald Trump’s administration.

The Canadian John Doe plaintiff on Monday sued Markwayne Mullin, the current DHS secretary, in a lawsuit that contends DHS is engaged in “a transparent gambit to chill speech the government doesn’t like.” The suit was brought by American Civil Liberties Union (ACLU) offices in D.C., where DHS is located, and in northern California, the jurisdiction where Google has its headquarters.