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)
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Sen. George V. Voinovich, Ohio Republican (left), and Sen. George S. LeMieux, Florida Republican (right), broke with their party Tuesday to help Democrats advance President Obama's small-business assistance bill in the Senate. A final Senate vote is expected later this week. Then the bill must go back to the House for final approval.
Senate candidate Christine O'Donnell chats with voters in Wilmington, Del., on Tuesday. Ms. O'Donnell took on nine-term Rep. Michael N. Castle in the Republican primary for a U.S. Senate seat. (AP Photo)
Rep. Michael N. Castle, who has held elective office in Delaware since the mid-1980s, finds himself unexpectedly behind "tea party" favorite Christine O'Donnell in the Republican primary for the Senate. (AP Photo)
Sen. Jack Reed, Rhode Island Democrat, thinks the Senate will have a "serious debate" on the so-called Bush tax-cut extension, but he will not speculate on an agreement. House Democratic leaders say they want to see what the Senate does before acting. (Associated Press)
Associated Press photographs
West Virginia Gov. Joe Manchin III (left), a Democrat, leads in polls for a Senate seat, but his GOP rival, businessman John Raese (right), has closed the gap. One analyst calls it a "race worth watching."
Rep. Michael N. Castle, Delaware Republican, is taking his GOP rival for the nomination for Senate more seriously after a Republican senator was denied renomination by an insurgent in Alaska.
California Assemblywoman Julia Brownley, a Democrat from Santa Monica, left, talks with state Senator Christine Kehoe, a Democrat from San Diego, during the Senate debate over Ms. Brownley's bill proposing to ban use of plastic shopping bags at the Capitol in Sacramento Tuesday, Aug. 31, 2010. The measure failed.(AP Photo/Rich Pedroncelli)
Democratic Senate candidate Robin Carnahan talks to members of the media during the Governor's Ham Breakfast at the Missouri State Fair Thursday, Aug. 19, 2010 in Sedalia, Mo. (AP Photo/Charlie Riedel)
Joe Miller, Republican candidate for U.S. Senate, and his wife, Kathleen, enter election central in Anchorage, Alaska, on Tuesday. Returns showed Mr. Miller ahead of incumbent Sen. Lisa Murkowski.
Senate candidate Joe Miller has been campaigning door to door in Anchorage, Alaska. Mr. Miller has the support of the "tea party" movement and the backing of former Alaska Gov. Sarah Palin. (Associated Press)
Democratic Sen. Patty Murray is likely to face GOP favorite Dino Rossi in Washington's election for the Senate seat. In recent polls, Mr. Rossi trails Mrs. Murray by about 4 percentage points. (AP Photo)