The two areas I can see Elon working the Trump angle are deregulation - related to solar permitting, and energy storage, related to grid modernization, energy independence and infrastructure.
If Trump "deregulated" the permitting of solar (made a single, nationally accepted permit, like Germany) and cut soft costs to those similar to Germany's, then Elon has outmaneuvered coal and eventually natural gas as solar + storage - soft costs wins on cost in most places now and in many other places sooner rather than later (see reports by state of solar grid parity by UBS and attached image).
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You heard a preview of the argument today when Trump discussed all his "friends" that have wanted to build things in the US, only to be denied based on rampant regulations. The growth of Solar jobs, which has doubled in the past 5 years and now surpasses coal and oil and gas exploration (
Clean-Energy Jobs Surpass Oil Drilling for First Time in U.S.) is ripe for the Trump story of how deregulation caused the explosion of good paying, American jobs. He will announce the regulation change at his advisor Elon's U.S. Solar factory in his home state of New York.
The Storage angle also works with the infrastructure and grid modernization piece of the Trump infrastructure play he rolled out in broad strokes today. With 11% of Texas power coming from wind and increasing renewable production in the old "rust belt" he will Trumpet a US made, energy independent, modernized grid for all the new manufacturing coming back and to the US. It will allow Trump to keep claiming that he is a Huge Environmentalist, just like he's a huge feminist.
If these changes/investments happen, Elon and Tesla win the long game. I think Elon already believes he's going to win on the electrification of transportation (see Bloomberg video on Peak oil in 2022). He's now going for the energy jugular.