This is the line the White House told us, but it contradicts what Musk and Trump themselves have said. It's also clear from their actions and social media posts that if Musk is merely advising, then Trump is rubber stamp approving whatever Musk tells him without any independent verification.

"Trump tends to echo the words of whomever last spoke to him, making direct access to him even more valuable" is what people said about him in 2016 [1]. Being his advisor is an incredibly powerful role, much more so than with most other government leaders

https://www.vox.com/2016/8/29/12691276/trump-believe-flop-fl...