U.S. Senator John McCain (R-AZ) waits to be introduced during a campaign rally at Dobson High School in Mesa

 
U.S. Senator John McCain (R-AZ) waits to be introduced during a campaign rally at Dobson High School in Mesa
U.S. Senator John McCain (R-AZ) waits to be introduced during a campaign rally at Dobson High School in Mesa, Arizona March 27, 2010. McCain who is seeking a fifth term as U.S. Senator received former Alaska Governor and Vice Presidential candidate Sarah Palin's endorsement yesterday and will challenge JD Hayworth during the Republican primary in August 2010. REUTERS/Joshua Lott (UNITED STATES - Tags: POLITICS)