Take a look at these two fields. The first is Republicans who are not running in 2012: Jeb Bush, Haley Barbour, Chris Christie, Mitch Daniels, Mike Huckabee, Mike Pence, Paul Ryan, John Thune and Donald Trump.
Now take a look at the Republicans who are running or getting ready to run: Herman Cain, Newt Gingrich, Jon Huntsman, Gary Johnson, Ron Paul, Tim Pawlenty, Buddy Roemer, Mitt Romney and Rick Santorum.
Which is the stronger field? I have not identified any of these guys by the offices they hold or have held, because if you have to ask yourself “Who is that guy?” then it shows you why the Republicans are at a disadvantage. Nobody has to ask who Obama is, and that is why he doesn’t have to spend a penny of his campaign funds on TV commercials introducing himself to the American people.
I don't disagree with Simon's analysis above. But I find it intriguing he doesn't once mention Rudi Giulani. Has Rudy Giulani dismissed a run in 2012, and wouldn't he represent not only a viable alternative to Romney, but a formidable opponent for Obama ?