The most you could say is there are some questions about how the legal system is supposed to deal with potential abuses of presidential power (is impeachment the "only" way). I think this is dumb, also, but OK it's not an insane question.
"The president shot a child live on TV at a news conference" is not even in that ballpark, and certainly "the president shot a child before he was even president" isn't.
That Trump being elected president should give him a "CAN DO CRIMES NOW, ALSO PREVIOUS CRIMES DON'T MATTER EITHER" card is a completely absurd argument that *only* our illustrious political journalists take seriously, or even pretend to.
