The people who say that Trump should act Presidential are the ones who think Trump should take every punch in the face he gets and just smile and say and do nothing.
Those are the cries of people who don't know Trump and never even met him.
Trump doesn't take punches he gets without fighting back and that is EXACTLY why people voted for Trump.
The people who voted for Trump, want Trump, not a Presidential lap dog who will cow tow to his enemies
The minute Trump acts Presidential, he will lose his base, and in turn, lose the 2020 election. So, I am sure the left wants Trump to not be Trump to win in 2020, cause they won't beat him with their insane policies.