Over the weekend Donald Trump committed one of the worst verbal “glitches” of the campaign so far. After delivering his standard line about how Joe Biden should be forced to take a cognitive test and rambling on about how he had “aced” his, Trump then said: “Doc Ronny Johnson, does everyone know Doc Ronny Johnson from Texas? He was the White House doctor and he said that I was the healthiest, he feels, president in history so I liked him very much.” Trump was very close with this former admiral (busted down to captain for his inappropriate behavior, drinking and drug use) doctor, now congressman. I wrote about their relationship some years back: Brig. Gen. Dr. Richard Tubb, said in a letter that the doctor had been attached like “Velcro” to Trump since Inauguration Day. Tubb explained that [the] office is “one of only a very few in the White House Residence proper,” located directly across the hall from the president’s private elevator. He said that “on any given day ‘physician’s office,’ as it is known, is generally the first and last to see the President.” They were tight and Trump surely knows (or knew) that his last name is Jackson not Johnson and yet he said it wrong twice. But then he does that doesn’t he? Recall that he also repeatedly confused Nikki Haley with Nancy Pelosi at another rally earlier this year. But doing it in the same breath that he’s slagging Biden’s cognitive abilities takes it to…