Continued from page 2

“You take all the work that was done earlier this year when we made four and a half million voter contacts in a state of 5.7 million,” Mr. Walker said Friday in an interview on “Fox and Friends.” “We had tens of thousands of volunteers helps us in my election earlier this year. That excitement continues on.”

Polls, though, show Mr. Obama leads Mr. Romney in Wisconsin among registered and likely voters who have grown more optimistic about the direction of the country. Polls show that votes also see Mr. Obama as a more favorable candidate and better equipped to handle the economy.

Wisconsin is a key piece of the puzzle for the Romney campaign — particularly if Mr. Obama wins Ohio.

But history suggests he faces an uphill battle. Voters here have not supported a Republican for president since they swung their support behind President Ronald Reagan in 1984.

Mr. Romney plans to spend Saturday in New Hampshire, Iowa and Colorado. He plans on Sunday to hold campaign events in Iowa, Ohio, Pennsylvania and Virginia.