Who would be the Republican candidate under this scenario? It's going to take someone of some caliber to win California, though I do agree it's not impossible. Republicans refuse to do that though. It goes against their values or something. I don't understand them.
Not impossible? What planet do you live on? The Republican platform in 2012 will be running on the most poisonous economic platform ever campaigned on by either party in the history of our country.
Reforming (gutting) entitlement programs
and
Tax cuts for the wealthy/corporations
Which in it by themselves are unpopular, together they're toxic.
Obama maybe end up being the weakest incumbent since Carter, but the GOP will be running Goldwater.
What happens when you do 1980 D vs 1964 R ? Certainly not a landslide in either direction.
Also keep in mind the electorate will be only 68 to 72% white in 2012, but I guess you figure Hispanics (who are overwhelmingly economic liberals ) will vote for tea party economics if you just put Rubio on the ticket.