Comment by runako

Let's leave aside for a moment the notion that there are any significant number of US manufacturers making stuff for 0% margins.

So you suggest that increasing the tariff allows the US maker to increase their margin. We're not talking about them reducing input costs (in fact, the opposite in many cases), so the only way you could mean for them to increase their margin is by raising price. And to get the full benefit, you suggest they raise their price to match the price of the imports. And yes, this is what will happen, US makers will increase their prices because their low-cost competition is gone.

So you're now kind of agreeing with the poster you initially disagreed with.

(Of course, for many goods there are no US factories here and no reasonable ability to make the goods here at prices that would make sense, even accounting for high tariff barriers. So in those cases, consumers will just pay more for the same goods.)