The richest man in the world is getting a lesson in Trump. Doubts abound as to whether he will graduate in 2028 with a four-year degree in Trumpism: It is now a parlor game in Washington and Silicon Valley to speculate just how long the Musk-Trump relationship will last. The answer, as discarded aides from Mr. Trump’s first term will tell you, may depend on Mr. Musk’s ability to placate the boss and keep a relatively low profile — but also to shiv a rival when the time comes. In short, how to play the politics of Trumpworld. Most of the people who now surround Mr. Trump in the transition are battle-tested aides from his past fights, or decades-long personal friends. Mr. Musk is neither. What he brings instead are his 200 million followers on X and the roughly $200 million he spent to help elect Mr. Trump. Both of those have greatly impressed the president-elect. Mr. Trump, gobsmacked by Mr. Musk’s willingness to lay off 80 percent of the staff at X, has said the tech billionaire will help lead a Department of Government Efficiency alongside Vivek Ramaswamy. I just love the fact that Trump thinks laying off staff at a social media platform (which, by the way, has become a total wingnut sewer and is failing at a rapid rate) is equivalent in any way to “reforming” the US Government. It’s absurd. Especially when you hear something like this: In private meetings at Mar-a-Lago, Mr. Musk shows little familiarity with policy or…