If Zero’s votes are disqualified then McCain has 100% of the qualified electors and hence would be president.
Your “expectation” may not be what the electors would do. They are free to anything they want.
Actually, McCain would get the Democrat nomination and someone like Chuck Baldwin can run against him. :)
Nonsense. The Constitution states that the winner must have a majority of the electoral votes cast. If McCain doesn't then in your scenario regardless of what happens to Obama the election would have to go to the House.
Your expectation may not be what the electors would do. They are free to anything they want.
But these are Democratic electors. They'll go for Biden before McCain.