I'm going to disagree somewhat here. It only takes a small percentage of GOP voters not turning out because they don't like Romneycare, or his overall moderate stance, or the fact that he's mormon, to sway a close election. These turnout numbers should be viewed cautiously in terms of predictive power to the general election, but it isn't a great sign for the GOP this year.
Comparisons with Kerry are iffy in the sense that there are conservatives who literally think Romney is a liberal in sheep's clothing and they fanatically believe this. This includes both libertarian types and social conservatives. Dems weren't that excited over Kerry, but in general they didn't hold these kinds of strong negative opinions of him.
Possible, but I will bet that 2012 turnout by self identified Republicans will be equal to or greater than historical averages.
