-- MARK STRASSMANN, THANK YOU. >>> VICE PRESIDENT HARRIS AND GOT ARE GEARING UP FOR THEIR FIRST PRESIDENTIAL DEBATE TOMORROW NIGHT. THE TWO CANDIDATES ARE TAKING VERY DIFFERENT APPROACHES IN PREPARING FOR THEIR ONLY SCHEDULED DEBATE AT THIS TIME. HARRIS HAS BEEN PRACTICING WITH A CAMPAIGN ADVISER STANDING IN FOR HER RIVAL. TRUMP HAS BEEN TAKING A MORE INFORMAL APPROACH, BRUSHING UP WITH STAFFERS ON POLICIES. OUR CBS NEWS BATTLEGROUND TRACKER SHOWS A TIGHT RACE AND ELECTION DAY JUST SEVEN BASICALLY ONE LITTLE WHITE HOUSE AND POLITICAL CORRESPONDENT ED O'KEEFE WHAT IS HARRIS' STRATEGY GOING INTO THE DEBATE? >> IT IS MORE FORMAL, MORE TYPICAL REHEARSAL STYLE PREPARATION. SHE HAS BEEN THE LAST SEVERAL DAYS AT A DOWNTOWN PITTSBURGH HOTEL WITH A.I.D.S. TRYING TO REPLICATE WHAT THE STUDIO ITSELF WILL LOOK LIKE TOMORROW NIGHT IN PHILADELPHIA. WE ARE TOLD THERE IS A STAGE, CAMERAS, LIGHTS THERE IS LECTURING AND AN ABILITY TO GO BACK AND WATCH THE TAPE, REVIEW THE TAPE WITH 13 TO GET A SENSE OF NOT ONLY WHAT SHE IS SAYING, BUT HOW SHE THING IT ON NUMBER MEMBER, ULTIMATELY, THIS BECOMES A PRETTY INTIMATE VIDEO EXPERIENCE WHOEVER IS WATCHING THIS. HOWEVER, THEY ARE WATCHING THIS SHE IS EXPECTED TO FLY THIS AFTERNOON FROM PITTSBURGH TO PHILADELPHIA TO CONTINUE PREPARATION FROM THERE. WHAT IS GOING ON ESSENTIALLY DAYS IN THE KEYSTONE STATE OF PENNSYLVANIA, ARGUABLY, THE MOST CRITICAL BATTLEGROUND STATE, USING IT AS BACKGROUND FOR THE SEPARATION WITH POLICY A LONG TIME CAMPAIGN A HANDFUL OF OTHERS, THE OFFICIALS DIDN'T CAMPAIGN. HUSBAND AND FULL OF OTHER FAMILY AND FRIENDS.>> SO LIGHTS, LECTERNS, CAMERAS. WHAT IS TRUMP DOING? REMARK -- >> Reporter: NOT QUITE -- NOT QUITE THAT. LESS FORMAL CONVERSATIONS OR MAYBE QUICK REVIEW SESSIONS FROM A.I.D.S. AND OTHER ASSOCIATES LIKE A FOR THE CONGRESSMAN, MATH HE WOULD HAVE BEEN HIM WHAT HIS STANCE IS ON CERTAIN ISSUES, TRYING TO KEEP HIM FOCUSED ON POLICY ON ISSUES THEMSELVES AND LESS ON THE PERSONAL. BELIEVING THAT IF HE CAN TRY TO REMAIN SUBSTANTIVE THROUGHOUT THIS EXCHANGE HE'S GOT A BETTER SHOT OF HOLDING HIS OWN ESSENTIALLY HOLDING HIS VOICE, TO SOME EXTENT IN VARIOUS SURVEYS, AS IT IS TO DO, AND ALL BETS ARE OFF HE HAS THE LAST SEVERAL DAYS I WERE NOW IN FLORIDA HEADED TO PHILADELPHIA TOMORROW FOR THAT EVENT. WE WILL SEE HOW HE DOES AS HE SAYS PUBLICLY, NO NEED TO FORMALLY PREPARE OR REHEARSE THE WAY HARRIS DOES, BECAUSE AS HE LIKES TO PUT IT, HE HAS BEEN PREPARING FOR THIS HIS ENTIRE LIFE. THAT MAY BE THE CASE THEM UP THERE HAVE BEEN AT LEAST SOME MORE FORMAL CONVERSATIONS WITH A.I.D.S. ABOUT POLICY AND OTHER ISSUES TO REFRESH HIS MEMORY AND MAKE SURE HE'S GOT ANSWERS READY. >> THE HARRIS CAMPAIGN SAYS THIS IS WHERE TRUMP SHINES. THEY ARE TRYING TO INCREASE EXPECTATIONS FOR HIM. LET'S TALK ABOUT THIS NEW HARRIS CAMPAIGN AT AHEAD OF THE DEBATE EXPECTED TO SHOW SOME OF TRUMP'S ON TOP OF ADMINISTRATION OFFICIALS SAYING HE'S NOT FIT FOR OFFICE. WHAT WE KNOW? >> Reporter: THIS IS AN AD THAT WILL BE AIRING IN PLACES WHERE THE FORMER PRESIDENT HAS A TENDENCY TO WATCH TELEVISION. PALM BEACH, FLORIDA, PHILADELPHIA WHERE HE WILL BE BY TOMORROW, AND THE FOX NEWS CHANNEL. IT'S NOW THAT'S PART OF THE ONGOING $350 MILLION AD BY THE HARRIS CAMPAIGN DESIGNED TO TARGET AT HIM AND HIS MOST ARDENT SUPPORTERS, REPLAYING THE COMMENTS OF THE FORMER VICE PRESIDENT, MIKE PENCE, THE FORMER DEFENSE SECRETARY, MIKE ESPER, HIS FORMER NATIONAL SECURITY ADVISOR, JOHN BOLTON AND COMMENTS MADE ABOUT LEADERS LIKE TRUMPED BY THE FORMER CHAIRMAN OF THE JOINT CHIEFS OF STAFF, MARK MILLIE. ALL DESIGNED TO REMIND VIEWERS, THOSE THAT SEE IT, BEHIND -- BESIDES TRUMP, PERHAPS, THAT SOME THAT HAVE WORKED CLOSEST WITH HIM BEER ANOTHER FOUR YEARS OF DONALD TRUMP ALL OF THIS, THE EXPECTATION SETTING, THE WORD THAT HARRIS HAS BEEN PRACTICING WITH AN AID THAT IS DRESSED LIKE TRUMP, THIS AT ALL DESIGNED TO GET INTO HIS HEAD. ALL DESIGNED TO STIR THE POT IN HOPES THAT THE TRUMP THAT SHOWS UP IS AN ANGRY I AND SOMEONE THAT'S GOING TO GET MORE PERSONAL, BECAUSE DE