Trump is handling this badly. I don't think he knows what to do. He is preaching doom and gloom. The lighter material in his stand up is well worn insults. Who on earth would want to hear ten rallies of that?
Contrast this to Harris. I still can't say she is super at being charismatic and I did not like her speech back in 2020 debates and primaries. But Kamala will have a pretty good chance of convincing people that we are not screwed. After the pandemic and the post pandemic jerks and fits in the running of the world and our country, she is the first one to announce that we are done with that. Done with Trump, Biden sent to retirement. We have a good future. We can do this! (I am not the only one interpreting it this way, several news people have said the same all day).