Micheal Shear offers five reasons why many Republicans are skipping the 2012 presidential race:
This one sticks out to me:
4. The Tea Party. The emergence of the Tea Party movement as a force inside the Republican Party requires potential presidential candidates to pick sides in an intraparty philosophical struggle. The risks are clear for some Republicans who may have to alter or modify earlier positions to get through a contentious primary. Less clear are the benefits of having that support during a general election, especially if it means alienating independents in the process. Some of the most high-profile Tea Party candidates in 2010 did not fare so well in the general election.
