Mark McKinnon, former advisor to John McCain, begs Palin not to run for president:

If Palin runs, I think the entire Republican primary process will be hijacked. With ardent fans and a rabid media, it will become Palin-palooza. A celebrity fest will follow with even more amplitude than the adulation and adoration that surrounded Barack Obama, who was so revered he was sometimes referred to in biblical proportions as “The One.” An all-consuming super nova, Palin will suck the oxygen out of every room, everywhere she goes. And one of two things will happen. Discerning conservative voters in early primary states will be offended by the circus-like atmosphere and the presumption that they could so easily fall for a “cult of personality.” And they will vote against her. And she will lose. Or, Republican voters will be completely swept up in the mania and nominate her as the GOP standard bearer to go up against President Obama. And she will loseperhaps the only Republican nominee who could lose in 2012.

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