Trump supporters report higher levels of psychopathy, manipulativeness, callousness, and narcissism
Trump supporters report higher levels of psychopathy, manipulativeness, callousness, and narcissism

Trump supporters report higher levels of psychopathy, manipulativeness, callousness, and narcissism

No way.
Doing the blanket psycho-analysis on "Voters of Party X" is great content but miserable politics. You end up with this weird inversion, wherein "being angry" gets coded as "Trump supporter". And that leads to talking-head pundits accusing college protesters, angry constituents, and anyone unhappy with their sitting elected rep of being "MAGA", regardless of their actual political beliefs.
No, those talking heads were going to do it anyways. You're making the mistake of assuming they're honest actors that need studies like this to give them ideas.
Only when their anger aligns with major political policies of the current regime. No one is looking at someone belligerently pissed off at trans exclusion or lack of action on climate change and saying "Heh, Trump voters, ammirite!?" Yes, someone who is pissed off at gun control laws is not necessarily a Trump supporter, but if that is their main platform of concern that gets them riled up, barring any other context, it's not unusual to put them in that camp. Nor is it ultimately all that harmful, as far as I can see, to do that even if turns out to be innacurate.