Candidates talk energy in the final debate, but don't stray from their usual talking points The third presidential debate yielded nothing new from Barack Obama or John McCain on climate or energy policy, but both candidates pointed to an environmental issue to demonstrate their independence from their respective parties. When McCain challenged Obama to name a major issue on which he's differed with Democratic leaders, Obama mentioned "clean coal," among other things: "I support clean coal technology. Doesn't make me popular with environmentalists." McCain, in trying to distinguish himself from President Bush, said, "I have disagreed with leaders of my own party," and took credit for "bringing climate change to the floor of the Senate for the first time." At one point, moderator Bob Schieffer of CBS said, "Let's talk about energy and climate control," but he then dropped the climate component and asked, "Would each of you give us a number, a specific number of how much you believe we can reduce our foreign oil imports during your first term?"....