Rick Perry for President buttons are already appearing at the Republicans summer dinner where the Texas governor is speaking tonight in Birmingham, Ala. on Aug. 12, 2011. The Texas governor is expected to enter the race for 2012 GOP presidential nomination on Saturday with appearances in South Carolina and New Hampshire. (AP Photo/Butch Dill)

Photo by: Butch Dill

Rick Perry for President buttons are already appearing at the Republicans summer dinner where the Texas governor is speaking tonight in Birmingham, Ala. on Aug. 12, 2011. The Texas governor is expected to enter the race for 2012 GOP presidential nomination on Saturday with appearances in South Carolina and New Hampshire. (AP Photo/Butch Dill)