 Every single day I'm surrounded by good docs. If they think there's a problem, I promise you, or even if they don't think it's a problem, they think I should have a neurological exam again, I'll do it. The president spoke even as many Democrats have been calling for him to end his campaign. Donald Trump mocked the 81-year-old's performance on social media and his verbal blunder, referring to Kamala Harris as Vice President Trump.