Mid-last month Trump professed to not know who Ann Coulter was. But there is pretty solid evidence that his sudden renewed interest in The Wall correlates with her talking about it on her show.
Now she is one of only 45 people he follows on Twitter. Plus, as noted in the link above above, she has introduced him at his own rallies. But he didn’t know her.
But now less than a month later he magically not only remembers who she is but he calls her a “wacky nut job.”
Other people he has had difficulty remembering that he knows include David Duke (head of the KKK), Michael Cohen (doesn’t know that well, only handled a tiny fraction of his legal work cuz face it he’s been sued a lot), Paul Manafort who just managed his campaign, and Jared Kushner, (that last one is Borowitz being funny)