Republican Senate candidate Christine O'Donnell smiles while addressing supporters after winning the Republican nomination for Senate in Delaware, Tuesday, Sept. 14, 2010, in Dover, Ms. O'Donnell upset Rep. Mike Castle. (AP Photo/Rob Carr)

Photo by: Rob Carr

Republican Senate candidate Christine O'Donnell smiles while addressing supporters after winning the Republican nomination for Senate in Delaware, Tuesday, Sept. 14, 2010, in Dover, Ms. O'Donnell upset Rep. Mike Castle. (AP Photo/Rob Carr)