Michigan Congressmember Justin Amash announced Thursday he was leaving the Republican Party to become an independent. In an op-ed for The Washington Post, he said that we are caught in a “partisan death spiral,” writing, “The two-party system has evolved into an existential threat to American principles and institutions. … I’m asking you to join me in rejecting the partisan loyalties and rhetoric that divide and dehumanize us.” In May, Amash became the first Republican lawmaker to express support for impeaching President Trump. In a CNN interview Sunday, Amash said high-level members of the Republican Party thanked him privately for speaking out in favor of impeachment. He also did not rule out a 2020 presidential bid.