 Two politicians known to be on Donald Trump's vice presidential list, Senator Marco Rubio and Representative Byron Donalds, are from Florida. That's where the former president also lives. And that's leaving open a scenario where his running mate would have to move if the Republican ticket wins. The U.S. Constitution prohibits the president and vice president from residing in the same state. If the situation were not handled properly, the 12th Amendment could prevent the 30 Florida electors from casting their vote if Republicans win the state.