Washington Post writes:
Obama starts the general election with 15 states (plus the District of Columbia) and 196 electoral votes solidly for him while Romney begins with 21 states and 170 electoral votes solidly in his corner. (One of the states solidly for Romney is Indiana, where Obama won in 2008 but no one expects a repeat performance in 2012.) Another three states — Pennsylvania (20 electoral votes), Michigan (16) and New Mexico (5) — lean toward Obama while Arizona (11) and Missouri (10) lean toward Romney. Add up the states solidly for Obama and those leaning his way and you get 237 electoral votes. Add up the states solidly for Romney and those leaning his way and you get 191 electoral votes. While Obama is closer to the prize than Romney, victory will likely come for either man from the nine swing states — Colorado, Florida, Iowa, Nevada, New Hampshire, North Carolina, Ohio, Wisconsin and Virginia — that are considered genuine toss-ups in our first electoral college predictions.Those nine states comprise 110 electoral votes; whichever candidate wins a majority of them will almost certainly win the presidency.
NOTE: I deleted the map I posted early this morning as I’d uploaded the wrong image. I need to label these files better.