2020 US presidential debate calendar: Here's what you need to know

Like many things this year, the presidential and vice presidential debates will look a little different.  US President Donald Trump and Democratic nominee Joe Biden are set to square off in a face-to-face debate for the first time. There will only be one moderator per debate. Each debate will run uninterrupted for an hour and a half.
 
How many presidential debates will there be this year...
Three, along with a vice presidential debate.
 
What do we know about the topics that will be discussed...
 The first moderator, Chris Wallace of Fox News, released a list of six general