They're profit maximizing everywhere. Their prices in the US are already what they think is the about as high as they can go while maintaining sufficient sales volume. If they could use tariffs to increase their prices without hurting sales, they'd do it. If they aren't doing that, chances are they have alreasy set US prices where price times volume is the greatest for the current market conditions. Worse, the economy is weakening so they may have to revise prices downwards. Probably by adjusting the mid-range model prices or introducing new, cheaper intermediate models.