There's a diary up right now which gripes that John Barrow is "a DINO". There's no such thing.
I know, I know, there are Democrats who aren't good Democrats. Sometimes, in fact, there are Democrats who are bad enough that we should primary them -- I gave money to one Bill Halter when he primaried one Blanche Lincoln, because I thought she needed to be given a swift kick.
But then, when she won the primary, I gave money to her general election campaign.
Blanche Lincoln was not a good Democrat in the US Senate. That said, she was a reliable vote for Harry Reid and the rest of the Senate leadership. John Barrow certainly votes in ways I don't like, and does so frequently. However, he's not going to vote for John Boehner for Speaker of the House. He's not going to pointlessly obstruct the House forever just to spite our current Democratic President.
These folks are Democrats. They generally support Democratic policies. Barrow has a consistent positive score from NARAL -- not 100% some years, no, but every Republican Representative is below 10%...or they're no longer a Republican representative.
Don't fall into the Red State purity trap. Sometimes, we need to primary not-so-good Democrats with better Democrats. But the not-so-good Democrats aren't Democrats in Name Only.