This is false, Waxman is the chair.
And if you say it's because Democrat Dingell serves in the majority why is it that he was the top recipient in 2003-2004 when Repubs were the majority?
http://www.opensecrets.org/politicians/summary.php?cid=N00001783&cycle=2004
Again, true or false, Leftists have a general philosophy of taxing that which is healthy and subsidizing that which is not.
I would like to see your answer to that.
I'm not saying there aren't other factors, there almost always are, but other things being equal when corps come to DC rattling their tin cup (and especially unionized corps), they know Dems are their best shot.
Waxman will be the chair when the new Congress convenes. Until then, Dingell is the chair and has been since the Democrats took over control of the House. In fact, Dingell has been the senior Democrat serving on the committee for 28 years. These facts, and not your silly horseshit, are why he gets campaign contributions from the autos.