At a rally in Iowa on Tuesday, Trump argued that the only reason to vote for Democrats "is if you are exhausted of winning".
Trump said Wednesday that he expects to visit Florida on either Sunday or Monday if he can ensure that his trip won't disrupt recovery efforts.
"We know when Americans face hardship we support each other, we stand for each other, we care for each other, and we will always pull through", he said.
But he's also calling the drop "a correction we've been waiting for for a long time".
President Trump's former lawyer Michael Cohen, who until this summer was the Republican National Committee's deputy finance chairman, has returned to the Democratic Party. He promised to travel to Florida "very shortly".
WATCH: Trump defends holding rally as Hurricane Michael devastates southeastern U.S.
"I don't want to disappoint people", he said to at the White House.
Supreme Court Justice Brett Kavanaugh's recent confirmation hearings renewed attention to the topic as the Senate considered college professor Christine Blasey Ford's accusation that Kavanaugh sexually assaulted her.
President Donald Trump is set to campaign in Pennsylvania as Hurricane Michael pounds Florida's Panhandle. He told reporters he faced a "quagmire" about whether to attend the Pennsylvania rally because "thousands of people" were already lined up for the event.
The rally comes as Trump is escalating his attacks on Democrats.
Sanders responded Wednesday in a statement, saying Trump "is lying about the Medicare for All proposal" that he introduced.
On Wednesday, Trump touted two Republican congressmen, Mike Kelly and Lou Barletta.