Biden buys time but Democratic senator warns he could lose in ‘landslide’

President Joe Biden on Tuesday clung onto the Democratic nomination on a high-stakes day in Washington, but the risks of his refusal to step aside were laid bare when one of his party’s senators warned on CNN that Donald Trump could win in a “landslide.”

Biden’s stubbornness leaves Democrats increasingly fearful that the president could put at risk not just the White House but any chance of retaking the House or holding the Senate — already an uphill battle.

The White House did succeed in heading off rebellions in emotional meetings of Senate and House Democrats on...