Tomorrow. Former President Donald Trump and Vice President Kamala Harris will face off against each other in a presidential debate. The showdown is the only debate scheduled before election day. NB C's Bree Jackson brings us more on how both sides have been preparing while staying on the campaign trail. President Trump and Vice President Harris preparing to face off. Harris holding mock debates and making campaign stops in Pittsburgh Trump, previewing his punch lines at rallies were run by stupid people, stupid, stupid people. And we found that out at the debate with Joe, how did that work out? The two presidential hopefuls locked in a tight race. Both campaigns know there is a lot at stake. Well, listen, I don't think she's gonna underestimate Donald Trump after all, he's been engaged in these debates at the presidential level since 2016. I think he needs to let uh Kamala Harris talk something she's been reluctant to do unless she's reading a teleprompter Harris picking up key endorsements from Republicans, Liz and Dick Cheney. I applaud the Cheneys for their courage in defending democracy. What's going to make the difference is their records. Tuesday's debate could be the difference maker for voters concerned about issues ranging from immigration to the economy. I think the debate really reveals a lot of the honest opinions of the people that are running for the offices. I think the debates open up a lot of answers to a lot of people's questions. Harris and Trump will make their case on the debate stage at National Constitution Center in Pennsylvania. A must win state for both candidates in Washington. Bree Jackson NBC News. And you can watch that debate right here on five on your side. Our coverage begins at 7 p.m.