re: Christ Almighty Joe..

I found articles back to 2010, which was the start of the time period I set for the google search.

He had definitely spoken about it and there have been articles written about it prior to 2019. He has even given speeches at conferences for speech impediments.

However, I agree that they are using the stutter as an excuse for his current gaffes. Switching to "you know the thing" was not (in my amateur opinion) caused by his failing to pronounce the correct word. He straight up forgot what he was talking about.