Mack McDowell, retired after 30 years in the US Army, sits in his study with framed battalion patches from tours in Iraq and Afghanistan, in Columbia, South Carolina March 25, 2012. In South Carolina's January primary, McDowell, the one-time Reagan supporter voted for Ron Paul "because of his unchanging stand against overseas involvement." In November, McDowell plans to vote for the candidate least likely to wage "knee-jerk reaction wars." REUTERS/Mary Ann Chastain (UNITED STATES - Tags: ELECTIONS POLITICS SOCIETY)