Mitt Romney's selection of Wisconsin Rep. Paul Ryan as running mate has put the Badger State into contention for the election, a new poll suggests.

Romney is leading President Barack Obama by a single percentage point in the state, according to a Rasmussen reports poll conducted among 500 likely voters on Wednesday.

That reverses a similar poll taken three weeks ago, when Obama held a 3 percentage point lead - 49 percent to 46 percent.

Ryan has a positive job approval rating among Wisconsin voters with 39 percent viewing him very favorably and another 18 percent giving him a favorable rating