Dem/Rep Congressional Split?

 I found this take on why the house might split Dem/Rep in the Midterm election extremely interesting.  

After all, it is the Senate that must approve Supreme Court appointments and voters may still favor conservative appointments...   In other words, if voters want their unhappiness with the war in Iraq to be heard while still endorsing the social issues they seem to favor, the best solution would be to elect a Democratic House and maintain a Republican Senate.