Accusations and attack ads abound as midterm races get down to the wire. Karen Tumulty (Washington Post) reports on California's contentious elections, Doyle McManus (Los Angeles Times) analyzes the too-close-to-call PA Senate race, Charles Babington (AP) discusses Obama's last-minute campaign blitz. And Kate Zernike (New York Times) looks at the Tea Party's impact on the 2010 elections.