"Lied" means intentionally deceived. I don't know anything about this outlet, but what reason do we have to believe they lied? Perhaps they were themselves deceived.
Edit: people be downvoting me just because I'm ignorant and asking in good faith. We have to fix this culture on lemmy where all questions are assumed to be "just-asking-questions" style trolling.
Eh, dislike this because outlets make claims about the future all the time based on what they think is most probable. I don't think that's lying in general. I would be more swayed that this is lying if they actually thought it was plausible that Trump would do this, and denied it.