Assumption #1: Congress will unite against Obama after his election. The likely reality will be Romney's campaign will be such a debacle that he will take out Senate and House Repubs and give Obama full control of congress again. (Wanna guess who the RINOs will blame? Bingo! The Conservatives who wouldn't back Mittens.)
Assumption #2: The Republican Congress will not oppose Romney. Whether Obama or Romney wins, it will not matter if the Republicans have both houses of Congress. Should the Republicans hold the House and take the Senate, they will still be run by RINOs and will fold like houses of cards when confronted by Obama (or Romney). These power hungry scum don't give a damn about Americans no matter who's POTUS. To block POTUS’ power grab you need leaders with cajones and NO ONE in the so-called “leadership” has shown any sign. “Go along, get along” is the prevailing attitude.
We have a winner!