Given the key role Elon Musk played in bringing Trump back to office, the newly vocal Silicon Valley right expects a bonanza of industry and “innovation”-friendly de-regulation — and they are celebrating it, very publicly.

The billionaire Tesla CEO is in a stronger position to influence development of federal rules that would put more of the fully self-driving cars on the road.

Since the election, Mr. Musk has used his social media company to talk up how bright the future will be under the president-elect.