Romney's focus on Ohio is not a surprise. He has spent more time campaigning there over the last year than any other state. And no Republican has won the presidency without carrying the Midwestern battleground.
But Romney has spent very little time in Pennsylvania, which hasn't supported a Republican presidential contender in nearly a quarter-century. As polls showed the race tightening there, Romney launched a statewide advertising campaign just last week.
Dismissed as desperation by Democrats, the Pennsylvania trip will at the very least send a message that Romney did all he could to deny Obama a second term.
"We can't let up now. We need to keep going until the final polls close tomorrow night," Romney political director Rich Beeson wrote supporters Monday. "With an election this important, let's leave it all on the field."