Arizona Senator John McCain answers a tweet during the opening plenary session titled "The Age of Participation" on the first day of the 2014 Meeting of the Clinton Global Initiative University at ... more 
Arizona Senator John McCain answers a tweet during the opening plenary session titled "The Age of Participation" on the first day of the 2014 Meeting of the Clinton Global Initiative University at Arizona State University in Tempe, Arizona, March 21, 2014. REUTERS/Samantha Sais (UNITED STATES - Tags: POLITICS EDUCATION) less 
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Reuters | Photo By SAMANTHA SAIS / Reuters
Sat, Mar 22, 2014 12:50 AM EDT