Justin Amash U.S. House of Representatives photo

The lone Republican calling for President Donald Trump's impeachment has quit an influential caucus of House conservatives.

A spokeswoman for Michigan Rep. Justin Amash confirmed on Tuesday that he had resigned from the Freedom Caucus. Amash is one of the group's founders, but it is now controlled by Trump's allies.

U.S. Rep. Rashida Tlaib campaign photo

A newly-sworn in congresswoman from Michigan is continuing her call for President Donald Trump’s impeachment.

U.S. Representative Rashida Tlaib wrote in an Op-Ed published by the Detroit Free Press that the president is a “direct and serious threat to our country.”

Tlaib then used an expletive to describe Trump in a meeting with supporters during her first official day in Congress.

Tlaib vowed to oust the President in her campaign for Michigan’s 13th Congressional District.