I actually hope for the opposite... if Romney wants to try to control the feral mess that is the GOP House, he's going to need the Democratic Senate.
It'll be a huge test if Romney's elected to try to show leadership and force the GOP House to behave, unlike Boehner who was scared of them and their control of the base. I honestly think Romney's best chance for a successful term, is to work with the Democrats. Because, considering his ability to bend like a yogi when needed, I shudder to think of the consequences of him being left to the whims of the right.
But I fully expect the president to be re-elected, so it's moot