President Barack Obama is in Henderson, Nev., for a strategy run-through ahead of the debate in Denver.
Republican presidential candidate Mitt Romney is set to spend most of Tuesday in debate prep at a Denver hotel. He told supporters at a rally Monday night that he would get America working again.
In Iowa, Romney's running mate, Paul Ryan, is set to visit three towns during a bus tour. The Wisconsin congressman will be in Clinton, Muscatine and Burlington on Tuesday.
Vice President Joe Biden has two campaign events scheduled in another swing state, North Carolina. He'll be in Charlotte and Asheville.