Vice President Kamala Harris, responding to former President Donald Trump's claims about her IQ, said she would take a cognitive test — and "would challenge him to take the same one."
I don't think this will help much, even if the outcome is what most think it will be.
There are already lots of radicalized people within the right-wing fascist bubble who will not believe anything that scientists, doctors, journalists, intellectuals, or people from a different political spectrum say. They only believe what their own bubble and their own media/leaders say. They are unfortunately already so far removed from any sort of objective fact-based reality that re-education will take a long time (maybe for the rest of their lives) and will not happen in time for the current elections in USA. Also, their rhetoric has already become quite 1930s Nazi-like. They are already using various dehumanizing or demonizing terms for their perceived "enemies", like vermin or low-lifes. It will probably become worse over time, and since the rhetoric is already bad, it's likely that violence will be the next step for them.
I would love to see it streamed/televised live in primetime in split screen so you can see them both doing it live so conspiracy theorists would have to really work at coming up with an excuse for Trump. Any other way Trump would afterwards just make up an alternate reality where he "aced" a dementia test.
I know he would still lie afterwards, and try and discredit the test, but people would have access to the video evidence, which is also the reason we have a better chance of him releasing his tax returns.
He has been planting the seeds for this. I'm sure it's also part of his disinformation campaign should he win, when people start showing video of him and his campaign doing horrible things, like trying to use the National Guard/Military against US citizens for instance.
The real point, of course, is just to have a quick talking point to swat away stupid questions about "Trump says you're low IQ. What're you going to do about it?" He would never publicly release anything medical that didn't come from a doctor (or "doctor") 100% in his pocket.