I listened to the UN speech live today and took note of laughter. I reviewed the transcript and it seems that Trump was responding to a sarcastic response.
"In less than two years, my administration has accomplished more than almost any administration in the history of our country.
America’s – so true. [Laughter] Didn’t expect that reaction, but that’s okay. [Laughter and applause.] "
"America's" ( insert remark ) then he says "so true" going to try and dig but seems like someone might have said " couldn't have been too hard" or something to that effect. Meaning everyone in that room knows we have been a joke for sometime. This is as of right now pure fantasy on my part..
Also I have noticed that some transcripts have left this part out-America’s – so true. [Laughter] . Makes it seem like they were laughing at him.
https://www.whitehouse.gov/briefings-statements/remarks-president-trump-73rd-session-united-nations-general-assembly-new-york-ny/