[ahahahahah]

The 6-1 ratio means that democrats are also getting a lot of money from dealership owners. Then, given that both the house and senate there are 60+% republican and all the republicans will vote for it, anyone voted against it is just symbolic and then is that symbol worth upsetting their own backers?

I think a better way of understanding how the two parties feel about regulation of specific industries is to look into how different states regulate those different industries. This doesn't work well for very regional industries (think coal or I guess logging, for example), but car dealerships are everywhere.