LA CROSSE, Wis. -- With just three days to go until election day, it's not just the candidates who are trying to sway undecided voters.

They have plenty of surrogates out this weekend working on their behalf.

The latest polls show every vote will be important to determine who wins the open U.S. Senate seat

The poll shows Rep. Tammy Baldwin with a slight lead over former Gov. Tommy Thompson -- 47 percent to 43 percent.

But 10 percent of voters polled said they are still undecided. That means the race very much up for grabs.

Gov. Scott Walker and Wisconsin U.S. Sen. Ron Johnson attended a "Get out the Vote" event at the La Crosse County Republican headquarters Saturday.

If Thompson wins, it would push Republicans one step closer to the senate majority.
Johnson said that's exactly what America needs.

"We need a Republican majority in the Senate,” said Johnson. “We heard Sen. Harry Reid said yesterday, if Mitt Romney is there as president, there's no way he's going to work with him. Now, I'm asking the voters of Wisconsin and the voters of America to consider who is really creating the gridlock in congress today?”

The seat has belonged to a Democrat since the late 1950s.

That's why Minnesota Democratic Sen. Al Franken crossed over the border to campaign for Baldwin.

He said she is the best candidate to take the open seat.

"First of all its next to Minnesota, so it's a neighborly thing to do, and I've known Tammy for a long time and I've gotten to know her over the years and I'm always impressed with her,” said Franken."

Both local Democrats and Republicans spent the day knocking on doors and making calls to reach everyone they can. That will be the plan for both parties right up to Election Day.