President Trump has boasted he has "one of the great memories of all time," although he didn't do much to prove it on Thursday during an appearance at the GOP retreat in White Sulphur Springs, West Virginia. When Trump got to the end of thanking Republican leaders by reading their names off his teleprompter, he asked Sen. John Cornyn (R-Texas), "Did they forget your name?"

They hadn't — just moments before, Trump had thanked the Senate majority whip by name. Trump, though, asked with light-hearted frustration: "What's going on here? John Cornyn, but everybody knows. They didn't put his name up but that's okay."

On Morning Joe, the hosts mockingly rewound the tape. "The mind of a 14-year-old at the peak of life!" host Joe Scarborough said.