Losing Florida, Ohio, Arizona, Georgia, Missouri, or North Carolina is not an option for a Republican candidate. They have to win every single one, and then they have to find 17 more electors in places like Virginia, New Hampshire, Wisconsin, Nevada, Colorado, Iowa, Pennsylvania, and Maine. That is why Trump's odds are poor. He has to move the national popular vote in his favor by 2-3 more points for a realistic path to open. And then he has to make the polling verify, with little or no ground game.