Rep. Justin Amash, a critic of President Trump who entertained a run against him in 2020, became the first Republican congressman to say the president “engaged in impeachable conduct.”

The Michigan lawmaker, often the lone Trump dissenter on his side of the aisle, shared his conclusions in a lengthy Twitter thread after reviewing the full special counsel report.

Amash wrote that after reading the 448-page report, he’d concluded that not only did Robert S. Mueller’s team show Trump attempting to obstruct justice, but that Attorney General William Barr had “deliberately misrepresented” the findings and that few members of Congress had even read it.