There's a bill that's been introduced in the House of Representatives, calling for Trump to get a physical and psychological exam, with the results applied to analysis under the 25th Amendment.

So, what the introducer of the bill s suggesting is, that by law, the President of the United States be determined to be psychologically and physically fit to be President.

Sounds reasonable to me.  If he's physically and psychologically fit, exams will prove that out, and we can all sleep well, at least as to those issues.  If not, then OTHER governmental leaders should know, so that something can bbe done.

That's not something the right is against, is it?  Official Medical/pychological professional determinations that POTUS be phsycially and psychologicaly fit to serve?  

The US government requires that of POTUS subordinates, after all.  People involved in Military, National Security, NASA related endeavors, law enforcement.  They require physicals and in someinstances personality tests.