text:  It's a night many political junkies have been waiting for. President Biden and former President Trump will participate in the first presidential debate, the first of two this election year. It's scheduled for 9 o'clock Eastern time at the CNN studios in Atlanta. The debate will also be simulcast on other networks, including CBS. Their microphones will be muted, except when it's their turn to speak. House Speaker Mike Johnson says Biden won't have the energy.