My university would give you an automatic F for plagiarism/cheating that would effectively set you back 2 years.
It is good this kid got caught when he did, because all he gets out of it now is one bad grade and a lesson to not use LLMs in the future (hopefully, the parents don't seem to be the best in this regard)
Theoretically, yes he can. Under US law (if the justice system was working correctly at all), no individual is above the law.
However, it is very unlikely. Trump is stupidly popular amongst people willing to overturn the establishment to let him do whatever he wants. Not to mention that he has a favourable supreme court that can just choose not to prosecute him.