Almost lost amid the furor surrounding President Donald Trump’s widely condemned promotion Wednesday morning of anti-Muslim videos was the president’s suggestion that his current media nemesis, Joe Scarborough, was somehow involved in the tragic death of an intern in 2001. Though PolitiFact has ruled Trump’s tweet “pants on fire,” the urban myths surrounding the death of Scarborough intern Lori Klausutis in his Florida district office have never truly disappeared from the fever swamps, and the president seemed to give them new life by suggesting MSNBC fire Scarborough based on this “unsolved mystery.”

“Looks like I picked a good day to stop responding to Trump’s bizarre tweets,” Scarborough replied. “He is not well.”

Although Trump’s tweet, a pedestrian attack beneath the dignity of the office of the President, is disgusting in its own right, the unfortunate reality is that there is no viable legal action Scarborough can take against the president for libel or defamation for one simple reason: The president is immune.