Rep. Justin Amash (R-Mich.) has stepped down from the conservative House Freedom Caucus, weeks after becoming the first Republican member of Congress to publicly support impeachment proceedings against President Donald Trump.

Amash, one of the Freedom Caucus’ founding members, told CNN that he’d announced his resignation at the group’s weekly board meeting on Monday. He said the meeting had been a “positive” one.

“I have the highest regard for them, and they’re my close friends,” Amash said of the Freedom Caucus. “I didn’t want to be a further distraction for the group.”

Amash made waves last month when he tweeted his conviction, based on his reading of special counsel Robert Mueller’s report, that Trump had “engaged in impeachable conduct.”