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.
Write-in votes total more than 80,000. It may take until Nov. 29 for the Alaska Senate election to be certified, but for now, incumbent Lisa Murkowski appears to be the winner.
The Colorado, Washington State, and Alaska Senate races are undecided on Wednesday morning. They won't tip the balance of power in the Senate, but two are important to Democrats.
Right ahead of the election, polls released almost simultaneously show vastly different results in Alaska’s Senate race. In one, Lisa Murkowski is leading; in another, it’s Joe Miller.
Democratic US Sen. Michael Bennet trails GOP challenger Ken Buck by 3 points in a Colorado Senate race that has seen outside groups spend heavily on negative campaign ads.
Democrat Kendrick Meek says he'll stay in the three-way Florida Senate race, but the Clinton-Meek saga is a PR nightmare for the party.
Carly Fiorina spent a day in the hospital this week. The impact it has on her bid to unseat Sen. Barbara Boxer could depend on how her campaign handles the challenge.
Dubbed by some as the 'least loyal' of all Senate Democrats and trailing in the polls, Wisconsin's Russ Feingold is in a tricky spot as he tries to appeal to the Democratic base.