President Joe Biden’s re-election campaign is in trouble. He likely won’t be the Democratic nominee, but he’s likely determined to put the Democratic Party through quite a roller-coaster ride before he and the party reach that conclusion. Most voters believe Biden should step aside and let someone new run — an AP-NORC poll out Tuesday found just 12% of Democrats want Biden to lead their party. Until now, Biden has been allowed to avoid any serious media questioning. He did almost no interviews, answered questions sporadically and survived on the basis of the country’s close partisan split that held fast...