@JPB,
Indeed.
So, it looks like there are only two serious candidates at this point: Romney and Pawlenty. Both have serious liabilities in their past, which will be exploited to the fullest by each other and by Obama.
Just as an example, Pawlenty has some quotes out there which have been dug up and look pretty damning to him; just a few years ago, he said "the era of 'small government' is over," and "the government needs to be more aggressively involved with regulation."
It's going to be hard for him to win the GOP primaries with past statements like that floating around; and there are a hundred more. He's not an especially conservative fellow.
Cycloptichorn