Article continues below advertisementGavin Newsom was quick to respond to Donald Trump's scathing on-air rant about him on Fox News.Less than an hour after the 79-year-old president went off on Newsom, 58 on Monday, November 10, the Governor of California took to X and shared a screenshot of a chat with AI bot Grok, in which he asked, "Do people with dementia repeat false things over and over again?"Article continues below advertisementSource: @gavinnewsom/XGavin Newsom trolled Donald Trump on X.