Something that bothers me about the whole free trade versus protectionism debate is that in any other context it's generally accepted that taxes harm the economy but that harm is offset by the services that government provides, and the argument is mostly over whether those government services are important enough to be worth the economic harm and whether there is a less harmful way to raise that revenue.

However, we don't seem to talk about tariffs the same way we talk about other taxes. Trade policies are considered good if they're good for the economy and bad if they're bad for the economy. The revenue aspects tend to get swept under the rug.

I wonder if this is just an example of successful marketing by large corporations (who are the ones who bear most of the cost of tariffs and trade barriers); that they've managed to get people who are otherwise fine with taxing corporations to be opposed to taxes when trade is involved.

That said, I agree with Bunnie that imposing tariffs on components but not finished goods is dumb, and will hurt hobbyists and companies that assemble electronics in the United States.