-- THE VICTIM WAS WITH HIS úUNC PART ON A TRAILER. >>> CANDIDATES HAVE LESS THAN 24 HOURS TO PREPARE FOR THE DEBATE AND TOMORROW IS THE FIRST SHOWDOWN BETWEEN VICE PRESIDENT HARRIS AND FORMER PRESIDENT TRUMP. IT WILL BE THE FIRST TIME THEY'VE MET IN PERSON. >> WE DON'T EXPECT THEM TO SPEND MUCH TIME ON PLEASANTRIES. WHAT CAN EXPECT. >> Reporter: POLITICAL ANALYSTS WILL SAY THAT THE DEBATE WITH JOE BIDEN TURNED THIS RACE ON ITS HEAD. EVERY POLL HAS IT AS A VIRTUAL TIE. >> I THINK THEY BOTH HAVE A LOT AT STAKE. >> Reporter: HOW BIG OF A DEAL IS TOMORROW? >> IT'S A HUGE DEAL . >> Reporter: THIS IS THE 1st FOR VICE PRESIDENT HARRIS. JON KELLER SAID EACH CANDIDATE HAS SOMETHING TO PROVE. >> THE DEBATE IS CRUCIAL BECAUSE -- WELL TOWARD ELECTION DAY. IT IS IMPORTANT IN TERMS OF THE FIRST IMPRESSION THAT KAMALA HARRIS NEEDS TO MAKE WITH A LOT OF VOTERS, AND IT'S IMPORTANT IN TERMS OF TRUMP SHOWING THAT HE HAS NOT LOST HIS FASTBALL. THEY'VE BEEN BUSY BALANCING THE CAMPAIGN TRAIL AND THE DEBATE PREPARATION. THIS IS A UNIQUE OPPORTUNITY TO EARN UNDECIDED VOTERS. >> THEY TEND TO GO TO THE DEBATE AND IT'S TRUE THAT EARLY VOTING BEGINS IN THE MATTER OF DAYS IN SOME STATES. >> IT BEEN SEVEN WEEKS SINCE SHE STEPPED INTO THE TOP OF THE TICKET. SHE WILL FACE THE CHALLENGE OF DEFINING HERSELF AFTER THE DEBATE.