As the GOP continue to support fossil fuels... ie coal... the Iowans and their dependence on government "clean air/alternative fuel" subsidies are considered at risk. Iowa boast being the leading producer of ethanol and wind "power".
Would either party really strip their subsidies, though? Iowa being the first primary state has given it some degree of protection from the presidents of both parties. I think if a president signed off on taking the subsidies away, his party's next candidates
(state and national level) would get ripped apart there next go round' and thus possibly imperil their presidential chances.