If Biden drops out now, how do the Democrats choose a new candidate?

The president has given no indication he plans to step aside, but possible replacements are already being named

Joe Biden is reportedly weighing whether to withdraw from the presidential race following his damaging debate performance last week, in which he repeatedly tripped over his own words and failed to rebut Donald Trump's many false claims.

According to the New York Times, Biden told a key ally that he knows his upcoming interview with George Stephanopoulos of ABC News and campaign appearances in Pennsylvania and Wisconsin will be crucial in quelling voters' concerns about his fitness for the presidency. A Reuters/Ipsos poll that closed on Tuesday found that Biden and Trump remain tied in the race while one-third of Democrats believe the president should drop out of the race.