John,
You may have overloaded the poor guy with too many opposing views simultaneously. It would be natural for him to fend off the attack -- logic, reason be damned.
Should Harris use this confrontational approach, she will win no "independent, skeptical voters" and lose the election.
The Jonathon Swan approach can be more productive. Recalling his interview, he disarmed Donald Trump with flattery: "Your people love you," suggesting a wonder and magical brilliance of the man. Bob Woodward did the same and extracted a book from him. David Frost got the confession from Nixon, and Nixon and Kissinger opened the doors to China with similar tactics.
The FIGHT, FIGHT, FIGHT approach reinforces Trump's base. A cleverer game is needed.
Best.