 At 107.7 FM, W299CC, Vicksburg. It's 2 o'clock. This is CBS News on the Hour, sponsored by Progressive Insurance. I'm Allison Keys. President Biden is battling on two fronts, both against COVID and against a chorus of his fellow Democrats who want him to step aside from his re-election campaign and pass the torch to someone with a better chance of beating Donald Trump. CBS's Katherine Watson with the latest.