MADISON (WKOW) -- Heading into the final weekend before next Tuesday's primary election, it's anybody's guess as to who will win the Republican nomination for U.S. Senate.
But one poll shows former Governor Tommy Thompson as the clear favorite.
He is the featured guest on Capitol City Sunday this weekend.
The most recent Marquette Law School Poll shows Thompson with an eight-point lead over the rest of the field, and tells the former Governor he has the momentum he needs to convince a large number of undecided voters to pick him.
"I think all of that means that, over the weekend, when people are making up their mind and say, 'I know Tommy Thompson, I trust him, I know he can get the job done, he did it for Wisconsin, he'll do it at the federal level,' I think that is gonna be the deciding factor, plus the fact that I can win," said Thompson.
Thompson cites the fact that 12 out of 13 polls show him as the only Republican leading Madison Democrat Tammy Baldwin in a hypothetical general election match up.
Just last week, Eric Hovde accused the Thompson campaign of illegally conspiring with a super-PAC, Americans for Job Security, to run an attack ad against him.
Thompson responded to that serious allegation.
"I don't know this group, I haven't had any connection, I've never talked to them, I don't even know where they're from, and don't want to know," said Thompson. "And, this is a group that believes very strongly that Eric Hovde is not the person that should be elected to the United States Senate."
But, at least two independent polls, one from Public Policy Polling and the other from We Ask America, show a slight majority of GOP voters think Hovde should be elected.
The one that doesn't show that, is run by Dr. Charles Franklin, who explains there are differences between his Marquette Law poll and the others.
"We include cell phones, those polls don't," said Franklin. "But, we'll find out on Tuesday. Any poll can be right, any poll can be wrong. The best we can hope for is to be within the margin of error."
Capitol City Sunday airs at 9:00 a.m., right after This Week with George Stephanopoulos.