 Other top Democrats have not gone quite so far, but haven't closed the door completely. Congressman Jim Clyburn, a powerful South Carolina Democrat and co-chair of Biden's campaign, told MSNBC's Andrea Mitchell, quote, I will support Vice President Kamala Harris if President Joe Biden were to step aside, end quote, per NBC's Gary Grumbach. NBC reports House Speaker Emerita Nancy Pelosi said Biden's mental fitness is a, quote, legitimate question.