The coup to replace President Joe Biden as the Democrat nominee appears to be sputtering as prominent Democrats are publicly lining up behind the presumptive nominee despite deep private concerns documented within the party. From vulnerable Democrat senators trying to win reelection in red and purple states, to squad members from deep blue districts, to the chairs of the Congressional Black and Hispanic Caucuses, the party is publicly rallying behind an extremely vulnerable Biden to be at the top of the ticket this fall. Sens. Sherrod Brown (D-OH), Bob Casey (D-PA), and Jon Tester (D-MT), who face extremely competitive Senate...