Shares of electronic-vehicle maker Tesla fell more than those of GM and Ford, despite less exposure to impacts from potential tariffs on Canada and Mexico.

Tesla CEO Elon Musk’s closeness to President Trump, which has been a boon to the stock since the election in November, may have also played a role in Monday’s selloff. Canada has laid out plans for a 25% retaliatory tariff on all U.S. goods, but some officials have advocated for measures that directly target the President and his allies.