I don’t know about Trump’s reasons, the answer there is likely that it doesn’t flatter his ravenous ego enough. If somebody in his shambolic White House had a reason, it might be that U.S. carmakers don’t do much business exporting cars to Europe, so the payoff from zero tariffs would mostly go to European carmkers that manufacture in the U.S. for export to Europe. The U.S., Europe’s maquiladoras.
I don’t know about Trump’s reasons, the answer there is likely that it doesn’t flatter his ravenous ego enough. If somebody in his shambolic White House had a reason, it might be that U.S. carmakers don’t do much business exporting cars to Europe, so the payoff from zero tariffs would mostly go to European carmkers that manufacture in the U.S. for export to Europe. The U.S., Europe’s maquiladoras.