Yard signs supporting U.S. Senate candidate Richard Mourdock in Columbus, Ind., on April 23. Mourdock went on to beat incumbent Sen. Dick Lugar in a primary race that received national attention, and a flood of money from outside Indiana.
Curtis Tate/MCT /Landov
Republican Senate candidate Christine O'Donnell addresses supporters after winning the Republican nomination for Senate in Delaware, Tuesday, Sept. 14, 2010, in Dover, Del. O'Donnell upset Rep. Mike Castle.