Michigan Rep. Amash formally withdraws from House GOP caucus

Rep. Justin Amash of Michigan has formally withdrawn from the House Republican conference, days after announcing he is leaving the GOP because he has become disenchanted with partisan politics and "frightened by what I see from it."

Amash, who had been the only Republican in Congress to call for impeachment proceedings against President Donald Trump, told GOP leaders Monday he is withdrawing from the House GOP conference and resigning from the House oversight and Reform Committee. Both decisions are effective immediately.

In an opinion article published July 4 in The Washington Post, Amash said partisan politics is damaging American democracy.

Amash told CNN Sunday he plans to run for his House seat as an independent, but declined to rule out a 2020 presidential bid against Trump