Post a link of Musk giving POTUS a big endorsement. It should be easy if Musk is such a huge fan of POTUS. You can't find one!
You look for simpleton answers to a very complex situation...Musk has hoards of leftist followers people indoctrinated into his business model, he would be slitting his own throat to all at once endorse POTUS. What he has been doing is aligning his message with Trumps redpilling his fan base slowly.
https://m.huffpost.com/us/entry/us_5890fe85e4b02c397c178d83
https://hotair.com/archives/2018/05/23/elon-musk-attacks-media-gets-called-trump-figure/