Elon Musk warned of difficult times ahead for Tesla Inc. after one of the automaker’s worst quarters in over a decade.

In 2020, Tesla controlled nearly 80% of the U.S. market, based on data from Experian. By 2022, that was down to 65.4%, followed by 55% in 2023. This year, per Cox Automotive, that share continues to decline, hovering around 45% as of July 11.