As President Joe Biden nears the formal announcement of his 2024 reelection bid, one of the most important developments of the campaign is something that hasn't happened at all: No serious primary challenger has emerged. Biden has all but cleared the field despite concerns about his age - at 80, he is the oldest U.S. president in history - and the persistent misgivings about the president held by a large number of the party's voters. Democrats yearn for a fresh face in 2024, according to repeate
