The race: US Senate, Nevada
The intrigue: Incumbent Harry Reid, a close Obama ally and the sitting Senate majority leader, has been in the US Senate since 1986. He is now a deeply unpopular figure in his recession-hit home state, but his campaign was given a lifeline when Republicans selected conservative Tea Party favourite Sharron Angle as his opponent.
The odds: Recent polls show a neck-and-neck race, with Reid enjoying a slight edge but Angle hovering near the margin of error.
Date created : 2010-10-07