She's publicly, mildly admonished him over the past couple of years and we know he's a sensitive soul, which is probably why her meeting with him this morning might have been touted by the Beehive as a "bilateral" but is listed by the American's as a "pull-aside."
Trump has three other "bilateral" meetings after Ardern with Singapore, Egypt and Korea. It's interesting her pull-aside's closed to the media while all the other meetings are open to travelling journos.
So does the status of the meeting actually matter? It certainly sends a diplomatic signal, with The Washington Post once describing a pull-aside as the lowest level presidential meeting where he breaks away from a larger meeting for a few minutes of private time with a foreign leader.
Contrast that to the state dinner thrown at the White House, the public outings and the joint press conference with Australian Prime Minister Scott Morrison, who only got the job last August.
Australia's a fantastic country and a brilliant ally, Trump waxed to Scomo.
Unfortunately, or maybe fortunately, we won't get to hear the President's view of this country.