Obama warns 'democracy is on the line' because of Trump
05:11Fmr. Obama aides David Plouffe, who helped Obama with his DNC speech, and Robert Gibbs react to the former president's stark warnings about the current president.
Fmr. Obama aides David Plouffe, who helped Obama with his DNC speech, and Robert Gibbs react to the former president's stark warnings about the current president.
