Tesla is a very small energy company.
The US is known to have very big electrical infrastructure problems - wrong kind of generation in the wrong places, too fragile. It's something that really needs a state-level actor to plan the necessary investment and bang heads together, but it's too abstract for the electoral process. I still don't understand how Tesla's approach is supposed to scale under present constraints unless, at some point, they start to invest in oil or gas powered generation capacity to get their charger network to an actual tipping point. If you're right, then the other big energy players should be there as well.
If as I suspect this whole thing is a publicity stunt, well, inviting Musk makes sense.