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Secretary of State Robin Carnahan said about 51 percent of Missouri's registered voters will actually vote. Sherman Fabes has more from Jefferson City.
There are more than four million registered voters in the state.
Missouri State University political science profesor Brian Calfano, says that Carnahan's predictions may well be too low.
He says the turnout may hit 56 percent, thanks to the Tea Party movement.
"There's a good number folks, especially in the southwest part of the state, who have somewhat aligned with this tea party movement, and given that it seems as though that there is a bit of an intensity there that has not been there in previous cycles," Calfano said.
Secretary of State's office spokeswoman Laura Egerdal rejected a request to interview the Director of Elections, saying she was too busy preparing for next week's election.
From Jefferson City, I'm Sherman Fabes.