Well the argument I usually get back is "where do the profits" go. And if they go to Detriot then that is "American"
I've thought a lot about this and out of the price of an average car, how much is profit? $1500? That goes back to Japan or Detriot and what happens to it? They sit on it? Nope, it goes into product development, R&D, plant expansion, construction, and shareholder value. So the profit indirectly leads to economic benefit to Americans since the plants are being built here and Americans are employed to build the cars, and Americans hold the stock.
As for the rest of the price of the car, say the other $20,000, where does that go? That goes into capital costs of equipment (that might be bought or built in the US by US workers), salaries and benefits of US workers (that buy houses and furniture and cars and go to the movies and pay taxes and go out to eat) and so on and so forth. The suppliers making the parts for the cars might be here too...which is even more jobs being supported.
So to me the relative benefit of the "profits" is tiny compared to the rest of the dollars involved in the price of the car. From my stand point, I want to buy a car built here. My preference is GM, but I'll buy an American Maxima before an asian or even Canadian built Chevy any day.
I have a big crisis of concience with the Camaro...Canada? Again? Its an AMERICAN Icon, it should be built here. No offense to our northern friends but the car should be made here.