If the Republicans cave because they think Obama and the D's were given some sort of unfettered hegemony, then that is when we will see the destruction of the Republican Party. If they hold fast then they will be back in a couple of years. I am not that worried by gridlock. It keeps all those "good intentions" of our legislators from taking more of our freedoms.
Here is the popular vote totals and percentages for the Presidency. If anyone can turn over the manure and find a pony for the democrats, please let us all know.