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 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.

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.