Elon Musk’s bitter falling-out with President Trump could be costly for Tesla. As long as he is persona non grata in the Trump administration, Mr. Musk, the chief executive of Tesla, will struggle to persuade Republicans not to gut climate policies worth billions of dollars to the electric car and battery company.

Musk has long promised an autonomous Tesla vehicle, with estimates of delivery that were always “two or three years away.” Now a hand-selected group will be able to see the potentially game-changing car in action in the Texas capital for themselves.