Former New Jersey Gov. Chris Christie famously endorsed Donald Trump for the presidency after dropping out of the 2016 Republican primary. But this time? Not a chance, he says. “I can’t help him. No way,” Mr. Christie told Axios. “Look, I just can’t. When you have the Jan. 6 choir at a rally and you show video of it — I just don’t think that person is appropriate for the presidency.” Mr. Christie was referring to Mr. Trump’s decision to start a weekend rally in Waco, Texas, with a song recorded by jailed persons accused of assaulting the U.S. Capitol...