One can hardly fathom the twisted psyche of a president who, after acknowledging that Jamal Khashoggi, a contributing columnist for The Post’s Global Opinions, had likely been murdered, would go before a cheering mob to lavish praise on a U.S. congressman who physically attacked a journalist. “Any guy who can do a body-slam, he’s my kind of — he’s my guy,” Trump said in a Montana campaign appearance on Thursday, referring to Rep. Greg Gianforte (R-Mont.) who pleaded guilty to assaulting the Guardian’s reporter Ben Jacobs, who had the temerity to ask Gianforte a health-care question. “I had heard that he body-slammed a reporter. And he was way up. … I said ‘Oh this is terrible, he’s gonna lose the election,’ ” Trump continued. “Then I said, ‘Well, wait a minute, I know Montana pretty well, I think it might help him.’ And it did.” And his ghoulish fans ate that up. The Guardian’s U.S. editor responded with a statement: “To celebrate an attack on a journalist who was simply doing his job...