Joe Miller

Live blog: US midterm elections

21:39 GMT: A witty (and vulgar) website - "What the f___ has Obama done so far?" - is going viral on Facebook, with more than 53,000 fans. It presents a long list of various achievements in Obama's two years in office, and seems aimed at refuting Republican arguments that Obama has failed to bring his promised "hope and change".

21:21 GMT: BBC World News interviewed Democratic political consultant Peter Fenn just now. Fenn said that he expects Obama will act pragmatically and extend an "olive branch" to Republicans after the election and noted that Obama's approval rating is higher now than Clinton's in 1994, when Republicans won a huge midterm victory. Clinton was re-elected in 1996.