“Heroin overdoses are surging and meth overdoses in Nevada. Neh-VAHH-da," Trump said Wednesday night, drawing out the middle syllable. "You know what I said? You know what I said? I said when I came out here, I said nobody says it the other way. It has to be Neh-VAHH-da. Right? If you don't say it correctly, and it didn't happen to me, but it happened to a friend of mine, he was killed.”
So, yeah, Trump got the pronunciation of 'Nevada' wrong. And, yeah, he talked specifically about how he was pronouncing it correctly. And, yeah, he did so in front of a crowd of Nevadans.
But the icing on the cake is really how all of it is a digression following some crazy sounding, ungrammatical sentence on heroin and meth.