...Newsom reposted a clip on X of Trump’s diatribe and responded with a barb of his own: a screenshot of an interaction with Grok, the platform’s built-in AI chatbot, in which Grok was asked, “Do people with dementia repeat false things over and over again?”... ...Newsom’s stinging response comes as he’s infuriated MAGA voters by mimicking Trump’s puerile social media strategy in recent weeks....