He is being attacked continuously, so it is futile to try to respond to every attack. I would rather him spend time formulating a strategy to get funding for the border wall.
That is his MO and at age 70+ non-career politician, I do not expect him to change.
The wall strategy simply requires funding by congress, and cheap labor express career politicians in pockets of the donor class do not want to stop flow of millions of cheap labor across the southern border. Have you not heard the king of donor class (the Koch’s) already raise serious objections to tariffs which cuts down their profits due to their factories moved to cheaper labor countries? The sooner voters realize how they have been screwed by the cheap labor express, the better we will all be.
Only thing the POTUS can do is veto appropriations bill which does not fund the wall, and Trump has already threatened that. And he has brought the wall up in every one of his 100+ rallies.