Former president Bill Clinton said in a Sunday interview that President Obama is winning the presidential race in the states most likely to decide the outcome of the election. 

"I think that the president’s winning, and winning in the swing states," Clinton said in an interview on CBS's "Face The Nation."

Former President Bill Clinton (D). (John Raoux /AP)

Clinton added that if the upcoming presidential debates are roughly even, he thinks Obama will defeat Mitt Romney in November. He also cautioned that the financial influence of Republican groups makes the outcome of the election difficult to determine. 

"I think that assuming the debates are even a draw, I think the president will win," Clinton said. "But I think you can’t know because of the enormous financial advantage that Citizens United gave to these Republican Super PACs and because of the work they have done and will do on Election Day to try to reduce the number of young people, first generation immigrants, and minorities voting. And they have worked hard at this."

“Governor Romney is seeing strong support across all the battleground states, including those President Obama won with close to double digit margins or more," said Romney political director Rich Beeson.

Clinton, who polls show is immensely popular, has emerged as arguably the most important surrogate for Obama. Clinton said Sunday that he didn't think that Romney's comment that "47 percent" of Americans do not pay income taxes amounted to smart politics and offered an rebuttal against the argument. 

"But it's interesting I, you know I know a lot of higher-income people, a lot of whom help me do my work and they're supporting Governor Romney. And a lot of people say things like that but I think it's worth pointing out, if you look at that 47 percent, they, first they do pay taxes. They pay Social Security taxes, they pay Medicare taxes, they pay state and local taxes. Second, they are out of the federal income tax pool for two reasons: one is the economic crash which lowered a lot of people's incomes; even a lot of the newer jobs don't pay high incomes," he said.