In Monday night's gubernatorial debate Chet Culver said the U.S. Chamber of Commerce ranks Iowa the fifth-best business climate in the country. I was as perplexed as Jim Nussle was when I heard that on the radio. Iowa's business climate is terrible. Todd Dorman did some fact checking after the debate and found that the Tax Foundation ranked Iowa's business tax climate 43rd in the nation. South Dakota ranked second, while Minnesota took 41st place, Illinois ranked 25th, and Wisconsin stood at 38th. ... Now I see that David Felipe, a spokesman for the U.S. Chamber of Commerce, said he doesn't know what Culver is talking about. He said his organization doesn't compile business-climate rankings. "We didn't do the study," he said.