Remember when Barack Obama was DOOOOOMED! because in the general election he couldn't possibly win states he lost in the primaries, particularly big blue states? How'd that work out?
Primaries:

General:

Clinton states won by Obama, west to east: California, Nevada, New Mexico, Indiana, Ohio, Pennsylvania, New Jersey, New York, Massachusetts, New Hampshire, and Rhode Island. Total electoral votes: 183.
Oh, and, um, Michigan and Florida -- 44 more.