Romney, Paul Ryan Lead Obama In Wisconsin Poll

Though a Wall Street Journal/NBC poll showed the net-zero effect that Paul Ryan seems to be having as Mitt Romney's running mate nationwide, swing-state polls have displayed the "bump" that traditionally comes from vice presidential candidates.

Romney has improved his standing in six crucial swing-state polls since the Ryan announcement: Michigan, Virginia, Ohio, Wisconsin, New Hampshire and Pennsylvania.

Here's a state-by-state breakdown:

Ohio: Romney and Ryan got a good start there last week, with a new Purple Strategies survey showing Romney leading the state by 2 points. It was Romney's first lead in Ohio since a Rasmussen poll in May. Before that, Romney had not had an advantage in the state since a Fox News poll in February. Moreover, the Purple Strategies poll found that Ryan was viewed more favorably than Vice President Joe Biden, and voters saw the Romney-Ryan ticket as more likely to bring "real change" to Washington.

Virginia: The same Purple Strategies poll also showed that Ryan propelled the ticket to a lead in the Old Dominion, after Obama had leads in 13 of the last 14 polls of the state. The poll could be an outliers, but again, Ryan was viewed more favorably than both Biden and President Barack Obama. A survey from Democratic-leaning Public Policy Polling on Tuesday also found Obama's lead has shrunk in Virginia. However, voters chose Biden in a direct hypothetical pick of vice president, and opposed Ryan's Medicare plan by an 8-point margin.

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