Rep. Adam Kinzinger's (R-Ill.) announcement that he will retire after his current term marks the latest victory in former President Trump’s quest to purge his internal critics from the GOP and mold the Republican Party even more in his own image. Kinzinger's Friday announcement, along with stiff primary challenges facing other Republicans who voted for Trump’s impeachment earlier this year, underscores the headwinds critics of the former president face in their reelection bids — and just how Trumpian the House GOP conference is expected to be starting in 2023 in the likely absence of at least some of his detractors....