For people asking what this is about, I didn't look at the NYT because of the paywall, but here's an article that's very similar in tone from NPR.
Although they do state
The dozen Harris statements lacking in context are far less in comparison to 162 misstatements, exaggerations and outright lies that NPR found from Trump’s hour-long news conference Aug. 8.
the following items are really nit-picky. It's laid out as a list of misleading statements, but reading the details of each makes me think "ok, so basically true, then".
It's because back in April some right-wing nutjob editor quit NPR claiming an atmosphere of bias. So he fled to right-wing outlets (where he conveniently ignores their right-wing bias) and now NPR decides they need to go back to balancing the scales of the BoTh SiDeS bullshit.
Some of the "misleading" statements were Harris neglecting to enumerate the reasons why a stated policy goal might not succeed, which would be incredibly unusual to include in a speech of this nature.
I guess the point the author was trying to make was that saying you "will" do something in office is a promise, and if you don't have the ability to guarantee that promise can be kept you shouldn't say that thing at all? I love me some NPR but they're really bending over backwards with some of these...