personally, i think polls like this are pure bullshit (epsecially since there's no such thing as a truly american-made car anymore), but it is food for thought...
http://www.thecarconnection.com/index.asp?n=156,173&sid=173&article=8145CNW Marketing Research, Inc., a West Coast firm headed by old Detroit hand Art Spinella, has published a curious report on the political leanings of new car buyers. Basically, the overall results from some 150,000 respondents over a year's time are hardly surprising:
-The split between Republicans and Democrats is virtually the same as the popular vote outcome of the November 2004 presidential election, 29.7 percent vs. 28.7 percent.
-Generally, Republicans favor domestic brands and Democrats like the imports but this reflects the Red Republican (center and south) geographical division versus the West Coast and New England Blue Democratic states, and the fact imports have always been more popular on the coasts.
-The research firm reports the proportion of car buyers classifying themselves "independent" has nearly doubled since first asked in the late 1980s, from about 22 percent up to nearly 42 percent.
(more at the link)