GREENVILLE, Mich. (AP) — Rep. Justin Amash, the first Republican on Capitol Hill to accuse President Donald Trump of impeachable conduct, is facing a primary challenge.

State Rep. Jim Lower on Monday announced his candidacy for the 3rd Congressional District in western Michigan. The announcement came two days after Amash sent a series of tweets faulting Trump and Attorney General William Barr over special counsel Robert Mueller’s investigation into Russian meddling in the 2016 election.

The 30-year-old Lower, of Greenville, says he made the announcement earlier than planned after Amash attacked Trump.

Lower calls himself a “pro-Trump, pro-life, pro-jobs, pro-Second Amendment, pro-family values Republican.” He is in his second term in the Michigan House after working as a legislative staffer and political consultant.

Amash, first elected in 2010, won a 2014 primary challenge.