A new poll by Marquette University Law school shows Wisconsin governor Scott Walker solidifying his lead over his Democratic challenger, Milwaukee mayor Tom Barrett. Walker now leads Barrett by 7 points--52 percent to 45 percent. In the previous MU Law released two weeks ago, Walker led Barrett 50 percent to 44 percent. Though the pollster notes that Walker's margin over Barrett is "statistically unchanged," it's good news for Walker that he has now risen above 50 percent because if he can turn out and his current supporters, he's going to win. In the historic Republican wave of 2010, Walker won with 52.3 percent of the vote.