that's true, but you still have snowe and collins in Maine, Begich in Alaska, Johson in SD, Brown in mass.... why not Nelson in NE?
Nelson could have kept that seat as a conservaDem, but the ObamaCare vote really killed him. Partly because of the national attention he received leading up to the vote and partly because of the original deal he voted for that excluding the state of Nebraska from paying Medicare benefits. He went from being an out-of-the-way conservative Democrat in a Republican state to really, really unpopular in a matter of weeks. I have a friend from Omaha who told me a bunch of stories about Nelson getting heckled and people refusing to serve him in restaurants, etc.
Of course it's been a couple years now and it'll be another until the election so perhaps the rage has calmed some. But I'd be a little surprised to see Nelson surviving this one.