 CBS News Brief. President Joe Biden and former President Donald Trump heading into tonight's debate with everything to play for. It doesn't matter who wins the debate. What matters is that people change their minds and vote for that candidate. Pollster Frank Luntz. The CNN hosts a debate airing on CBS stations at 9 p.m. Eastern time. If you're in the South, you already know it's hot, but for how long? The heat dome locks in place in the South, and that's going to happen all the way through July 4th.