The relationship is so close, one source spilled, that Trump, 78, has been running nearly every cabinet pick by Musk — despite having a whole transition team at his beck and call.“Elon weighs in with an opinion that he’s largely formed from conversations from people he’s newly met, but he’s comfortable with Trump being the lone decider,” the insider said.The source added that “most” people in Trump World “are taking it as just a reality” that Musk is in the good graces of the once and future most powerful man in the world — and doubt any outside force could come between them because the tech mogul is “surprisingly agreeable” and happy to be along for the ride.“Sure, it’s competitive, but anyone who has seen the two or been in the room with the two knows there’s no competition in how Trump is treating Elon versus everyone else,” the source added.There’s “not even a close second” among the inner circle, this person went on.A second source confessed to The Post that Musk’s ubiquitous presence has created a bit of a rift in the Mar-a-Lago court.“There’s always people around Trump that are looking to make money off access, Elon stands in their way,” the second source said.