Republican state representative, Justin Amash of Michigan, plans to challenge President Trump after Amash said this weekend he believes President Donald Trump committed impeachable offenses.

State Rep. Jim Lower (R) said he would challenge Amash in the Republican Primary for his western Michigan seat rather than seek a third term in the state Legislature, according to the Detroit Free Press.

Lower said he had planned to run for some time and expected an announcement to be closer to July 4. But he said he chose to step up that timetable after Amash said on Saturday, May 16, on Twitter that after reading special counsel Robert Mueller’s report he believes the president committed impeachable offenses.

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, according to Fox17.

Amash took his stand on impeachment on Saturday in a tweet after reading special counsel Robert Mueller’s report into potential Russian election meddling.

He wrote Attorney General William Barr “deliberately misrepresented” Mueller’s report in his summary and that “Trump has engaged in impeachable conduct.”

Members of Amash’s own party widely criticized the libertarian-leaning congressman for his stance.

“Never a fan of Justin Amash, a total lightweight who opposes me and some of our great Republican ideas and policies just for the sake of getting his name out there through controversy,” Trump wrote Sunday.

“If he actually read the biased Mueller Report, ‘composed’ by 18 Angry [Democrats] who hated Trump, he would see that it was nevertheless strong on NO COLLUSION and, ultimately, NO OBSTRUCTION … Anyway, how do you Obstruct when there is no crime and, in fact, the crimes were committed by the other side? Justin is a loser who sadly plays right into our opponents hands!” he continued.