It isn't because of competition, it isn't because of quality even.  They've made HUGE strides in the last 2 decades.  But they haven't made those strides in the United States because of the UAW Union.  As pointed out here and here we are shown exactly why Ford, GM, and other domestic makers have fallen so far behind in so many ways that they are dying.  Make sure to listen all the way through, the last 15 seconds of the film hits the nail on the head.  The UAW will NOT allow GM, Ford, and other domestic makers to build plants like this.  The UAW, is essentially biting the hand that feeds.

Instead of America staying competitive we sit, laying limp to the mobster rules of the UAW.  Our manufacturers forced to ship more jobs out of country to places like Brazil and more technology out of country.  I'm all for helping out Brazil, but don't particularly like the fact that we're killing our own country, making it harder for our children, and generally screwing our future - this I'd say is NOT a good trade off.  All this in an attempt to stay alive in the face of shrinking sales and even more strict, draconian, and harsh rules and regulations enforced by the unions and their politic minions in office.

In addition to that, listen toward the end of the video.  Another thing they say is unique is the port that the factory has.  This is something a factory in the United States can no longer build, start, or create.  The regulations and monopolistic control of ports via city port authorities throughout the country, it is almost unfeasible except through political manipulation to build or utilize a port in the United States without excessive and burdensome red tape.  There are numerous other reasons that make the addition of ones own port for a factory a major plus, but this is just the slight tip of the ice berg.

A sick and twisted irony if you ask me.

Meanwhile Toyota, Honda, BMW, and even Hyundai all with the intelligence of Reagan and his lot, have all built competitive plants in the United States.  Almost all of their plants are high tech plants that now employ thousands upon thousands of Americans.  In a way, American Government and American Unions have functionally forced American Manufacturers to seek refuge out of country while foreign makers are becoming the true American Manufacturers.

The ironies continue.