 The high court may take up the issue again in a future case. President Biden and former President Trump getting ready to face off in tonight's presidential debate. Biden and Trump will be on stage at the CNN studios for the first of two currently planned major debates ahead of November's election. The 90-minute event starts at 9 Eastern, 8 Central tonight. There'll be no interruptions with no live audience, as well as mics muted when the other is speaking.