 Calls have arisen inside the Democrat ranks to replace Biden as a party's nominee, fearing he cannot win after his diminished health was on full display in the debate. None of those calls, though, are coming from inside the U.S. Senate. That's where Democrats say Biden remains the party's best shot at defeating Donald Trump in November. Democrat Ben Cardin told reporters, quote, Joe Biden might have had a bad evening, but we don't want four bad years under Donald Trump.