I'm not from the US, which is why I've been carefully considering what to say. In this overheated political landscape, it can be misinterpreted as interference. I will mostly share my observations.
I prefer reading to writing. Sometimes, I notice things others might easily miss. There was a gigantic wave of optimism, a tsunami of hope when Kamala Harris entered the race. I'm not talking about the official statements and the media spin, but about the tone of comments from the regular people.
Then she went on stage in that debate, and she said yeah, we need more fracking. That moment, all the grassroots energy simply died down. There was a very short lag, a few days maybe, when people still tried to convince themselves. Then nothing. Just endless "Trump is bad".
Yes, Trump is really bad. Trump is a catastrophe. But he hasn't gained voters compared to 2020. It would be very easy to beat him by mobilizing the same number of left-leaning people that came out to vote four years ago.