12 competitive U.S. Senate seats of 2014

The Washington Post lists the 12 “truly competitive” U.S. Senate races of 2014. WaPo,

“What we are left with is 12 races that can be considered truly competitive — meaning that either one (or both) of the national parties and/or the various outside groups have spent or will spend money on them. The races are tipped heavily toward Democratic-held seats; 10 of the 12 in contention — including the six most vulnerable — are in Democratic hands. Of the 12 states, Republican Mitt Romney carried nine in 2012.”