Google appears to have blocked AI search results for the query “does trump show signs of dementia” as well as other questions about his mental acuity, even though it will show AI results for similar searches about other presidents. When making the search about President Trump, AI Overviews will display a message that says, “An AI Overview is not available for this search”: Go directly to AI Mode, and you’ll only receive a list of 10 web results instead of a summarized page of information: