Article continues below advertisementKristi... who?Donald Trump made a major mistake in front of his Cabinet members, sending social media into a frenzy over his "full mental decline."While introducing Secretary of Homeland Security Kristi Noem, the president embarrassingly forgot her name. When he attempted to fix the flub, he dug himself into an even bigger hole."Secretary of Homeland Security Cristie Kerr," Trump said with Noem standing next to him at the podium.