Why can't they build this here?

http://www.businessweek.com/magazine/content/08_37/b4099060491065.htm?chan=autos_autos+--+lifestyle+subindex+page_top+stories

Why can't ford build this car in the U.S.? Who cares if diesel is $1 more? Simple math:

This is based on my driving, but just change the numbers around, it's multiplication, so it's all relative.

Gas:
10 gallons @ $3 = $30, @ 35 MPG = 350 miles. For me that's $35 per month
Diesel:
10 gallons @ $4 = $40, @ 65 MPG = 650 miles. For me that's about $20 per month