Trump on injecting disinfectants, and an example of his 'coherence':
"And then I see the disinfectant, where it knocks it out in a minute. One minute. And is there a way we can do something like that, by injection inside or almost a cleaning. Because you see it gets in the lungs, and it does a tremendous number on the lungs. So it would be interesting to check that.” https://www.politico.com/news/2021/04/23/trump-bleach-one-year-484399
Trump on the Charlottesville white nationalist protesters, and another example of his coherence:
"Reporter: "The neo-Nazis started this. They showed up in Charlottesville to protest --"
Trump: "Excuse me, excuse me. They didn’t put themselves -- and you had some very bad people in that group, but you also had people that were very fine people, on both sides. You had people in that group. Excuse me, excuse me. I saw the same pictures as you did. You had people in that group that were there to protest the taking down of, to them, a very, very important statue and the renaming of a park from Robert E. Lee to another name."" https://www.politifact.com/article/2019/apr/26/context-trumps-very-fine-people-both-sides-remarks/?aff_id=1262
Regarding US Intel; why don't you give me five examples of mistakes made by the US Intelligence Agencies in the past 20 years, and I'll give you five examples of mistakes made by Trump in his inauguration speech. Even if Trump didn't trust his intelligence people, why would he trust Putin?
Trump called the countries that immigrants to the US come from as "<deleted>hole countries", thus insulting the backgrounds of every US immigrant.
Regarding Biden's ability to form a coherent thought, why don't you offer proof? I've already given examples of Trump's incoherence.