Vice President Joe Biden delivers the keynote speech at the Michigan Democratic Party's annual Jefferson Jackson Dinner in Detroit, Saturday, April 20, 2013. (AP Photo/Rick Osentoski)

Associated Press
Vice President Joe Biden delivers the keynote speech at the Michigan Democratic Party's annual Jefferson Jackson Dinner in Detroit, Saturday, April 20, 2013. (AP Photo/Rick Osentoski)
Vice President Joe Biden delivers the keynote speech at the Michigan Democratic Party's annual Jefferson Jackson Dinner in Detroit, Saturday, April 20, 2013. (AP Photo/Rick Osentoski)
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