Talk show host Rush Limbaugh is sparking controversy again after he made comments that appear to call for riots in Denver during the Democratic National Convention this summer.He said the riots would ensure a Democrat is not elected as president, and his listeners have a responsibility to make sure it happens."Riots in Denver, the Democrat Convention would see to it that we don't elect Democrats," Limbaugh said during Wednesday's radio broadcast. He then went on to say that's the best thing that could happen to the country.Limbaugh cited Al Sharpton, saying the Barack Obama supporter threatened to superdelegates that "there's going to be trouble" if the presidency is taken from Obama.Several callers called in to the radio show to denounce Limbaugh's comments, when he later stated, "I am not inspiring or inciting riots, I am dreaming of riots in Denver."Limbaugh said with massive riots in Denver, which he called part of "Operation Chaos," the people on the far left would look bad."There won't be riots at our convention," Limbaugh said of the Republican National Convention. "We don't riot. We don't burn our cars. We don't burn down our houses. We don't kill our children. We don't do half the things the American left does."He believes electing Democrats will hurt America's security and economy and appeared to call on his listeners to make sure that doesn't happen."We do, hopefully, the right thing for the sake of this country. We're the only one in charge of our affairs. We don't farm out our defense if we elect Democrats ... and riots in Denver, at the Democratic Convention will see to it we don't elect Democrats. And that's the best damn thing that can happen to this country, as far as I can think," Limbaugh said.Later, Limbaugh downplayed his "dreaming of riots in Denver" statement, and said that he wasn't calling for riots and was referring to warnings of trouble if superdelegates decide the nomination at the Democratic National Convention.Limbaugh's comments prompted Denver Mayor John Hickenlooper to say, "Anyone who would call for riots in an American city has clearly lost their bearings."Democratic Sen. Ken Salazar also responded to Limbaugh's comments Friday, asking Lee Larsen, senior vice president of Clear Channel Radio Rocky Mountain Region to reprimand Limbaugh."As I read Mr. Limbaugh's comments about riots at the Democratic National Convention in Denver, they appear to me to be a clear exhortation that those riots are exactly what he wants to happen," Salazar said in a letter to Larsen.Denver will host the DNC on Aug. 25 to Aug. 28.