When is the second debate between Hillary Clinton and Donald Trump? The second debate will take place Sunday at Washington University in St. Louis. What time is the debate and how long will it last? The debate starts at 9 p.m. E.T. and will go for 90 minutes without commercial breaks. Who will moderate the debate? The moderators for the debate will be Martha Raddatz, chief global affairs correspondent for ABC's "This Week," and CNN anchor Anderson Cooper. What is the format of the debate? Unlike the first presidential debate, the second one is in a town hall style format. Half of the questions will be asked by audience members at the debate and the other half will be asked by Raddatz and Cooper. What's at stake for Hillary Clinton? Clinton wants to reignite her success from the first presidential debate and wipe away any memory of the vice presidential debate between her running mate, Sen. Tim Kaine, and Indiana Gov. Mike Pence. What's at stake for Donald Trump? The town hall-style format presents a new challenge for Trump. It's a difficult debate arena for candidates who haven't done it before, especially in terms of managing body language. The priority for Trump though is to not repeat his first debate performance.