I will echo the 1st comment's sentiment:
"I sure hope Musk got some sweet handshake deals on federal subsidies, because absolutely everyone was skeptical about his ability to influence Trump on Paris."
I'm a bit of a cynic, especially over Musk. I don't buy the altruistic motives he spouts and felt him getting close to the white house was smart, but not for the reasons most people want to believe. Him stepping down sells well to his base and seems like any reason for him to remain ($$ for alternatives) is gone.