Nevada Democratic Party officials have canceled a presidential debate co-sponsored by Fox News. The decision was made a day after Fox News Chair Roger Ailes joked about how Senator Barack Obama’s name is similar to Osama bin Laden’s. During a speech on Thursday to the Radio and Television News Directors Foundation First Amendment Dinner, Ailes said, “It’s true that Barack Obama is on the move. I don’t know if it’s true that President Bush called Musharraf and said, 'Why can't we catch this guy?” Fox News’ coverage of Obama had already been widely criticized. Last week, the filmmaker Robert Greenwald released a short online video featuring clips of recent Fox News coverage.