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:

Searches related to Trump are similarly constrained. Various inquiries about dementia, Alzheimer’s, and senility do not trigger an AI summary; instead, only a list of links appears within AI Mode.

The situation changes if different names are used. For instance, when searching “does Biden show signs of dementia”, Google doesn’t provide an AI Overview at all.

However, within AI Mode, it does give a summarized response. When I searched, it mentioned, “It’s not possible to definitively state whether former President Joe Biden has dementia based solely on publicly available information.”

Google also provides AI summaries for questions about Biden and Alzheimer’s, stating there is “no clinical diagnosis or public proof that former President Joe Biden has Alzheimer’s disease.”

This contrasts with what you find when using the names of other public figures or recent presidents. For example, using Obama’s name yields an AI Overview — when I inquired, it indicated that “No public evidence or statements from medical professionals suggest that former President Barack Obama has dementia.”

I got a similar result while searching about Obama in AI Mode:

There’s been a lot of coverage of the mental acuity of both President Trump and President Biden, who are the two oldest presidents ever, so it’s reasonable to expect that people might query Google about it. The company may be worried about accurately presenting information on a sensitive subject, as AI overviews remain susceptible to delivering incorrect information. But in this case, it may also be worried about the president’s response to such information. Google agreed this week to pay $24.5 million to settle a highly questionable lawsuit about Trump’s account being banned from YouTube.

Google spokesperson Davis Thompson didn’t say why AI overviews weren’t triggered for these queries when asked by The Verge. “As we’ve said, AI Overviews and AI Mode won’t show a response to every query.”

Update, September 30th: Added response from Google.