“‘COME ON, BARACK — SING IT!’ WHAT HAPPENED NEXT TURNED A WHITE HOUSE CONCERT INTO MUSIC HISTORY.” Nobody expected the President of the United States to grab a microphone. But during a star-studded White House blues celebration, Mick Jagger, B.B. King, and Buddy Guy playfully put Barack Obama on the spot — urging him to stop watching and start singing.
Barack Obama is widely remembered as one of the most culturally engaged and charismatic modern presidents, helping to define the idea of presidential cool. That charm was…