crank up the comments already started by some:
"Amid the chaos in Washington, Democrats and a former Republican congressman are calling Elon Musk "president" in an attack that seemingly suggests that Trump may not be in control." Newsweek
With trump's ego that seems like a brilliant strategy. If some repubs, all the dems, and enough news outlets start highlighting the President Musk mantra and suggest that trump is no longer in control he would blow a fuse in short order.
Nothing could infuriate trump more than have it appear that he's not in control of his own govt. Could that cause trump to turn on Musk or try to tone him down as he has done with so many others? Maybe. And how would Musk react? His ego is almost as big as trump's. Would he step back or turn on trump? It could be fun to watch.
Regardless, I think the President Musk rhetoric should be all over the news and social media.