Rush Limbaugh, while repeatedly insisting he is “not alleging a conspiracy,” suggested Monday the National Hurricane Center’s forecast models for Tropical Storm Isaac were altered to help President Barack Obama and “cast a pall” over the Republican National Convention.

“I’m not alleging conspiracies here. The Hurricane Center is the regime; the Hurricane Center is the Commerce Department,” Limbaugh said on his talk show. “It’s the government. It’s Obama.”