I am interested in the issue, but have no doubt of the outcome: Barack Hussein Obama will be duly elected by the Electoral College and inaugarated as the President of the United States. This will become just another bit of the Constitution consigned to the waste bin of history because its incovenient for politicians.
Republicans will do nothing about this, of that you can be sure. However, if the shoe was on the other foot, the Democrats would be raising unmitigated hell about it.
Then the Federal government will be illegitimate and so will be anything it asks its citizens to do. Presumably, we can stop paying Federal Income.