FILE - Former President Bill Clinton smiles as balloons fall during the final day of the Democratic National Convention, July 28, 2016, in Philadelphia. (AP Photo/Carolyn Kaster, file)

FILE - Democratic presidential nominee Bill Clinton faces a cheering audience after taking the podium to deliver his acceptance speech as his party's presidential nominee at the Democratic National Convention in New York, July 16, 1992. (AP Photo/Stephan Savoia, file)

FILE - Arkansas Gov. Bill Clinton speaks at the 1988 Democratic National Convention in Atlanta, July 21, 1988. (AP Photo, File)

FILE - Former President Bill Clinton addresses the Democratic National Convention in Charlotte, N.C., on Sept. 5, 2012. (AP Photo/David Goldman, file)

FILE - President Bill Clinton waves to the crowd as he takes the stage to speak at the Democratic National Convention, Aug. 14, 2000 in Los Angeles. (AP Photo/Bob Galbraith, file)