Chrysler X(has some mitsu parts in some cars)(owned by foreign company)
Dodge (Some parts are made over seas)(owned by foreign company)
Ferrari (foreign Owned by a french company Puegot i believe)
Ford (American owned, in bed with Japanese Mazda)
GMC (American owned, some vehicles made in mexico and canada as well as america)
Honda (japanese owned, has some plants in the US)
HUMMER (Owned by GM now, made off of the Tahoe, made in the USA)
Hyundai (Korean)
Infiniti (Owned by Nissan/Renault)
Isuzu (Japanese company that will go in the crapper within 10 years at their current rate)
Jaguar (owned by Ford)
Jeep (Dymler-Chysler)
Kia (Korean, has dealing with Ford on some 80's and 90's car, namely the Festiva and Aspire)
Lamborghini (Italian owned by VW)
Land Rover (Ford owned)
Lexus (Toyota, made in japan)
Lincoln (Ford)
Lotus (British, don't remeber who owns them)
Maserati (Italian, part of Ferrari)
Maybach (????)
Mazda (Japanses,Partly owned by Ford)
Mercedes Benz (Owned by Dymler Crysler)
Mercury (Ford)
Mitsubishi (Mitsubishi is a japanse company that is HUGE, just not in cars. Has some tie in's with Chrysler)
Nissan (Japanese Owned partly by Renault)
Oldsmobile (GM)
Pontiac (GM, cross platforms with Toyota)
Porsche (German Purity)
Saab (Ford owns them now it think)
Saturn (GM)
Subaru (Subaru is one of the only car companies that's not in bed with any others. Japanese owned)
Suzuki (Japanses owned)
Toyota (Japanese owned)
Toyota Truck (Made in america)
Volkswagen (German)
Volvo(Swiss)
Most all the car makers are in cohoots with eachother, and share technologie or parts to cut down on costs.
There are no true Domestic or Foreign car companies as the have cross ownership and mergers and deals that tie them together, and a lot of companies build cars in several different countries.