Democrats have ways to replace Joe Biden at the top of their presidential ticket after a harrowing debate against Republican Donald Trump ¡ª but doing so without their standard-bearer¡¯s acquiescence would be a daunting task.

Party members once united behind Biden are now scouring candidate resumes and researching rules for a contingency plan to present voters with a different nominee after a universally panned performance Thursday night cemented worries about the president¡¯s ability to serve a second term.

¡°The easiest one is, Biden takes himself out of the race,¡± said Elaine Kamarck, a Democratic National Committee member and author of a book about the presidential nominating process. ¡°Then yes, there¡¯s rules and procedures and the party would replace him.¡±