Some opinions here say that election years don't really affect interest rates... but I tend to think they do.
Looking at the charts at mortgage-x.com, it seems like rates are either declining, flat or slightly rising during an election year, and then will noticeable rise or drop afterwards.
This year... there isn't much room to drop... so it will remain flat or go up... but I doubt we will see whole percentage point spikes -- so even during 2013 rates should still be 3-4s (although anything can happen).