Democrats have been claiming that GOP voting bills are the biggest threat to democracy since the Civil War. But in the meantime, the Dems are staging a civil war of their own, and the target is, increasingly . . . Joe Biden! On Tiffany Cross's MSNBC show this morning, a cadre of black liberals tore into Biden, calling him "failing, delusional, and hypocritical" in regard to his efforts to pass federal voting-rights laws and undo the filibuster. At the end, Cross, inevitably, accused fellow Dems, seemingly including Joe Manchin and even Biden, of racism. She said, "Black folks are disproportionately...