Rep. Tom Rice’s landslide loss in the South Carolina Republican primary could prove to be a bad omen for Rep. Liz Cheney‘s reelection push in Wyoming. Mr. Rice and Ms. Cheney were among the 10 Republican House members who voted last year to impeach President Trump, and Mr. Rice is the first to fall in a primary. Four others decided to call it quits rather than face voters again. That means half of Mr. Trump‘s most fervent House GOP opponents won’t be returning — but the scalp the former president really wants belongs to Ms. Cheney, daughter of former Vice...