I actually think that the GOP gaining both houses in the last mid term election was a terrible thing for the GOP. Now that they are in control of both houses, they really dont have much of an excuse as to why things arent getting done. When the Democrats had control of the Senate, the GOP could just blame it on them, but now that they actually have to do stuff, they dont really have many more excuses and the polls will reflect that in the coming elections. Sure, they can just blame it on Obama as per usual, but Obamas approval rating is around 46% (Gallup) which isnt terrible considering thats almost half, while congressional approval rating is much, much lower, currently at around 14%.

There is some proof for this in the fact that in a number of states where they voted out Democrats, they also voted for progressive ballot measures.

When approval rating is that low, I doubt that people are going to want the same people in office. Now, this isnt guaranteeing a Democratic victory this election; it might take another cycle to see the colors change, but I would bet on the fact that the recent GOP victory will be short lived. Unless something radical happens in which case who knows?