US News & World Report: Republicans maintain a lead in the national generic congressional ballot, according to a new poll. And in Senate races in Illinois and Kentucky, voters say they are more likely to cast their ballots in opposition to the Obama administration than in favor of it. Other polls show first and second term House Democrats in Idaho, Indiana, and Maryland are virtually tied with their Republican challengers in districts that either backed Obama two years ago and supported George W. Bush in 2004, or supported GOP candidates in the past two presidential elections. Today's polls show that the ranks of vulnerable Democrats include Wisconsin's 18 year incumbent Sen. Russ Feingold, who is trailing by seven points, New York's first-term Rep. Scott Murphy, who is behind by 13 points, and Florida's freshman Rep. Alan Grayson, who lags behind his GOP challenger by seven points. Meanwhile, Republicans Pat Toomey and Rand Paul have opened up leads in Pennsylvania and Kentucky Senate races.