Policy issues

On this one, I have to say I'd side with McCain.
Corn ethanol subsidies strike me as a boondoggle and contribute to food inflation, waste taxpayer money and distract from better solutions.

Obama Camp Closely Linked With Ethanol - NYTimes.com:

"Ethanol is one area in which Mr. Obama strongly disagrees with his Republican opponent, Senator John McCain of Arizona. While both presidential candidates emphasize the need for the United States to achieve “energy security” while also slowing down the carbon emissions that are believed to contribute to global warming, they offer sharply different visions of the role that ethanol, which can be made from a variety of organic materials, should play in those efforts.

Mr. McCain advocates eliminating the multibillion-dollar annual government subsidies that domestic ethanol has long enjoyed. As a free trade advocate, he also opposes the 54-cent-a-gallon tariff that the United States slaps on imports of ethanol made from sugar cane, which packs more of an energy punch than corn-based ethanol and is cheaper to produce.

“We made a series of mistakes by not adopting a sustainable energy policy, one of which is the subsidies for corn ethanol, which I warned in Iowa were going to destroy the market” and contribute to inflation, Mr. McCain said this month in an interview with a Brazilian newspaper, O Estado de S�o Paulo. “Besides, it is wrong,” he added, to tax Brazilian-made sugar cane ethanol, “which is much more efficient than corn ethanol.”"