Will Ryan VP pick impact GOP Senate primary? - WQOW TV: Eau Claire, WI NEWS18 News, Weather, and Sports

MADISON (WKOW) -- All four of Wisconsin's Republican U.S. Senate candidates rearranged their schedules Sunday afternoon, so they could attend and campaign at the Romney-Ryan rally in Waukesha.

The surprise announcement of Paul Ryan as Mitt Romney's running-mate on Saturday morning, shifted the focus of GOP voters just three days out from the election.

With at least 10 percent of voters claiming they were still undecided as of last week, there are competing theories on how the timing of the Ryan announcement will affect the primary.

Will GOP voters turnout in higher numbers because the Ryan pick has them more energized about politics in general? Or, did it distract voters from the primary, causing a lower turnout?

There's also some question as to whether undecided voters will change much from their current leanings, because they haven't been thinking about the election as much as they would have otherwise.