Who do you see as winning the popular vote in this scenario?
Here's a kicker of a thought -- let's say McCain wins the popular vote with an electoral vote tie. How loud do you think the screaming will be if the House selects Obama? Or ... might a compromise be met with the House breaking the tie in McCain's favor with the Senate naming as VP the Democrat VP candidate, or maybe Obama?
The Senate would not be able to elect Obama as VP. The candidates from whom they are permitted to choose are solely the top 2 finishers in the EV--most likely, McCain & Obama's running mates. Unless this deal was worked out by early December and more than half of the Obama electors decided to vote for Obama as VP instead (which would not happen), the choice would solely be between the two running-mates.