According to the comments following Acosta's Tweet above, the gist seems to be that CNN et al lied because Trump followers think they got polls wrong.
There's not a whole lot of anyone noting the lies come out of Trump's mouth and the contradictory lies come out of Trump's mouth and it's easy to prove simple facts Trump lies about... nothing to do with poll numbers.
This morning on Velshi and Ruhle, they had some business guy on. Ruhle asked, since Trump's economy numbers are good, why does Trump feel the need to lie about them? The business guy said Trump doesn't lie. The two of them, Velshi and Ruhle, both pointed out very specific lies Trump has said in the last couple days about his numbers being better than anyone. The business guy just kept staring with deer-in-the-headlights eyes. He could only say, Trump has his own facts. Ruhle said, "no, there are facts and not facts but not two sets of facts."
No matter how simple they made it, with proof Trump was a liar, the business guy just kept staring, unable to answer anything except Trump wasn't lying.
There's a point where you have to wonder, have these people truly lost their minds?