(CNN) Three new polls done by NBC/Marist of the Senate and gubernatorial races in Michigan, Minnesota and Wisconsin show things may be taking a turn for the worse for Republicans in the fall elections.

The race for governor in Wisconsin has some unpleasant news for Republican incumbent, Gov. Scott Walker, who is seeking his third term in 2018. Sixty-one percent of Wisconsin's registered voters think they should "give a new person a chance" instead of re-electing Walker, the polling shows.

Wisconsin Superintendent of Public Instruction Tony Evers will be Walker's most likely Democratic competitor. His numbers show him ahead of the next contestant by 19 percentage points.

When facing one another, Evers currently leads Walker 54% to 41%, a significantly higher number than the Marquette University poll only a month ago, showing Walker beating Evers by four percentage points.

Wisconsin Democratic Sen. Tammy Baldwin has an advantage over both her possible challengers -- Kevin Nicholson and Leah Vukmir -- by at least 15 percentage points. CNN has the race rated as lean Democrat in Baldwin's favor.

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