The Democrat party will face a difficult map again in 2014, however. Twenty-one of the 35 seats up for election are now held by Democrats. Moreover, most the states that will be casting ballots for the Senate in 2014 are Republican leaning: 7 of the 21 Democratic-held seats are in states carried by the former Republican presidential nominee, Mitt Romney, while just one of the Republican seats is in a state won by President Obama.
Democrats could also suffer from the downside to presidential coattails. Most of the seats up for grabs in 2014 were last contested in 2008, a very strong Democratic year. Without having Mr. Obama on the ballot, and with an electorate that is likely to be older and whiter than in presidential years, some Democrats may find that their 2008 coattails have turned into a midterm headwind instead.