The USA has zero appetite for holding presidents accountable, even when they are clearly guilty of crimes like treason. Although Republicans would seek to prosecute a former Democrat president, they will always ruthlessly block any attempt to prosecute one of their own. As neofascists, this is entirely consistent with their power-at-any-price worldview.

The very worst Trump would receive, in the exceedingly unlikely event anyone did attempt to hold him accountable for tearing up official documents (which, being a mindless petulant infantile whiner, was probably his idea of a really smart and stable genius idea) would be a small fine that he would never pay.