Well I'm pretty sure he meant Pelosi, just has Haley on the mind.
Even Obama had a slip of the tongue once when he talked about having campaigned in all 58 states. But sh**t like this is just constant for trump. Even here if he had just slipped once and said Haley one could shrug it off - if you ignore the fact that he's increasingly givering nonsense with every given month - but he repeated Haley's name four separate times. That's not a slip of the tongue, that's when your brain is on autopilot senility.
That wasnt really a substantive error. There were 58 (though I recall it is 57) entities in the primaries, covering states and assorted territories like DC, Guam, etc. There just isnt a good word to characterize what those entities are - 'I visited all 58 delegations' is just as wrong. Of course, Fox made it out like Obama was an idiot who didnt know how many states there were.
But yeah, the problem with calling Trump's speeches a decline is that he started so low that there isnt much room for decline.