Mesa, Arizona. February 23, 2012 - As Republican candidates debated in the Mesa Arts Center, protesters including undocumented students, tea partiers, occupy movement members and Syrian president opponents, shouted slogans and held up signs and placards outside. In this photograph, Chris Jackson and other supporters of U.S. Republican presidential candidate Ron Paul demonstrate outside the complex where Paul debated with Mitt Romney, Rick Santorum, and Newt Gingrich in the city of Mesa. Photo by Eduardo Barraza &copy; 2012