There are about 100 posts saying exactly this same thing in the thread, but it doesn't make any sense! It's already exactly what the candidates do. After the primaries, the candidates make only token appearances in the states that one side or another already has in the bag and spend most of the rest of their time in Ohio, Florida, and Pennsylvania. Why would a republican, or a democrat, presently campaign in New Jersey, Massachusetts, Montana, or Texas? If any of those states are a tossup, the election isn't going to be close. The electoral college is only one of several bad structural features in the US system of governance, but it's the easiest one to fix.