Article continues below advertisementDonald Trump is only adding fuel to the fire over accusations that he's mentally unfit to lead. While in the midst of a Truth Social tirade on Monday, November 24, the 79-year-old president unintentionally shared a confusing post that included a screenshot of Sen. Mark Kelly of Arizona, a former Navy Captain and one of six Democratic lawmakers featured in a video released last week that urged U.S. service members and the intelligence community to refuse illegal orders.