Trump's rivals say he can't beat Biden. Polls say he can.

MIAMI — Donald Trump's rivals have pledged to support him if he wins the Republican nomination, but increasingly they are arguing to GOP voters that he can't beat President Joe Biden in a rematch. "I don’t think so, because I think that there’s just too many votes built in against him," Florida Gov. Ron DeSantis, who is polling second to Trump, told conservative radio host Hugh Hewitt last week. "You could have Jack Kennedy come back and show up, and he wouldn’t energize the Democrats as much as Trump does."...