 contrast between the two candidates. Johnson joked that it doesn't matter if Biden drinks a whole gallon of energy drinks, he can't match the energy of Trump, and he'll have to defend his record, including on the U.S.-Mexico border. Tonight's debate will be unlike any other in history. For the first time since a presidential debate in 1960 between John F. Kennedy and Richard Nixon, there will not be a live audience, and the candidates' mics will be muted when their opponent is speaking.