CONCORD, N.H. —

says he's willing to work across party lines to end gridlock in Washington but will not give up key Democratic measures like college financial aid or health care to achieve compromises.

While campaigning with former President Bill Clinton, Obama says "that's not a price I'm willing to pay" and says it would amount to "surrender." Recent polls show more voters trust Republican rival Mitt Romney to break Washington's stalemate.

Two days before the election, Obama and Clinton spoke to a crowd estimated at 14,000 during a chilly outdoor rally in Concord, N.H., kicking off a frenzied push to mobilize voters in battleground states.

Obama was also holding rallies in Ft. Lauderdale, Fla., Cincinnati, Ohio, and Aurora, Col., Clinton was headed for North Carolina and Minnesota.

-- The Associated Press