A physical exam? Medical? I can understand suggesting a mental-health assessment but I wonder why "physical".
Is there though some aspect of society unique to the USA? We foreigners see it and find it as baffling as it is distressing. We also see the arguing too, and do know it is a very sensitive party-political matter there - but one only Americans can deal with.
Even most of the other nations that do have somewhat more liberal gun and wild-animal hunting controls than the UK, very rarely suffer from gratuitous "mass" shootings.
....
[Since you wrote your original post we have of course had that appalling attack on a children's dancing club in the NW English town of Southport. That was with a knife not a gun, and the suspect is a British teenager who turned 18 so legally adult a week later, but really much the same sort of attack.
We do not yet know the motive - so far the suspect has been charged and remanded in custody, and I don't think he entered a plea of guilt or innocence at the remand hearing. Legally he is therefore considered innocent unless he admits guilt or is proven guilty by a Court of Law, which would of course examine the motive.
With a shooting, if the murderer also shoots himself, or someone else shoots him, dead before he can be caught properly, any motive can only be guessed at unless he has left some sort of clear notice of intent and reason. As that seems a common outcome it must make it harder to understand why such crimes occur, so perhaps find ways to reduce them.] .
