There's all kinds of wacky taxes, regulations, and barriers to prevent the US industry from having to compete with the world. One such example is the Chicken Tax:
Does that account for the fact that most US Tacoma’s are built in San Antonio (there’s also a plant in Tijuana) and the Tundra is also built at the San Antonio plant?
The tundra, F-150 and Honda Ridge line are all tied at 75% domestic US parts production. The Tacoma’s is a bit lower at 70%.