Tesla CEO Elon Musk has warned that the end of U.S. government support for electric vehicles could lead to “a few rough quarters,” following the automaker’s steepest revenue and delivery decline in more than a decade. Tesla is now relying on a long-promised affordable model and its autonomous ride-hailing roadmap to regain momentum, but immediate growth prospects look dim in the U.S. market. The caution comes as global EV sales continue to rise. According to Rho Motion, 9.1 million EVs were sold worldwide in the first half of…