This speaks to some of it but it does reference more in general terms "US Auto industry" rather than direct union offense. I can see from the article how they would have been on the same side of the arguments.
http://www.ucsusa.org/clean_vehicles...slow-lane.html
This references the UAW some.
http://www.cato.org/pubs/regulation/...n3/v32n3-2.pdf
This is a proposal to do direct imports of the complete cars and some of the roadblocks, little to do with the issues surrounding jobs but you could imagine the outcry if we imported significantly more fuel efficient complete autos built by Ford and GM overseas...
http://wheels.blogs.nytimes.com/2008...ome-good-cars/
Specifically mentions the unions...
http://www.bitbotters.com/47/why-ame...fficient-cars/
http://www.washingtonpost.com/wp-dyn...051900550.html
http://www.thestar.com/business/article/635994
http://www.msnbc.msn.com/id/17344368/ns/business-autos/