Tesla Inc.’s sales plummeted 59% last month in Germany, adding to indications that Chief Executive Officer’s Elon Musk political activities are hurting the carmaker’s business in major electric vehicle markets.

Tesla’s (TSLA) sales in Germany plummeted 59% in January after only 1,277 new cars were registered, the lowest monthly total since July 2021.

Tesla sold almost 60% fewer cars in Germany in January than in the year-earlier period, as the U.S. electric vehicle maker faces a test of popularity amid headline-grabbing political involvement by its billionaire CEO Elon Musk.