The decision by Sen. Ben Nelson (D) of Nebraska not to run for reelection in 2012 is a 'blow' to Democrats' efforts to retain their Senate majority, analysts say.
Consumer advocate Elizabeth Warren filed paperwork Thursday to form an exploratory committee for a US Senate run in Massachusetts. Republican Scott Brown currently holds that seat.
Wisconsin Sen. Herb Kohl says he's retiring after his fourth term ends in 2012. He is the sixth Democrat-aligned senator to do so, compared with only two Republicans.
Former governor and current DNC Chairman Tim Kaine declares his candidacy for the Virginia Senate race, joining former governor and senator George Allen (R).
Sen. Claire McCaskill already was going to face a tough 2012 reelection in Missouri. But news about unpaid taxes on – and questionable use of – her plane are weighing on the Democrat's chances.
Sen. Jim Webb (D) of Virginia won't seek reelection next year. But Virginia's Democratic bench isn't very deep.
A state judge has dismissed Joe Miller’s complaint that misspelled write-in votes for Lisa Murkowski should be tossed out. If the ruling stands, it's a blow to the tea party and Sarah Palin.
After laborious vote counting, Alaska Sen. Lisa Murkowski appears to have won her write-in campaign against tea party favorite Joe Miller. But Miller is challenging the vote count in court.
Sen. Patty Murray (D) of Washington State won reelection, though not by the comfortable margins she's used to. Farther north, the drama continues as Alaskans wait to see if incumbent Lisa Murkowski won her write-in challenge to tea party favorite Joe Miller.