All Americans owe a debt to unions, President Obama said today.

Speaking at a Labor Day celebration in Cincinnati, Obama spoke of the reforms that the labor movement has helped secure over the last century.

"It was the American worker-union men and women-who returned from World War II to make our economy the envy of the world," Obama told a cheering audience. "It was labor that helped build the largest middle class in history.  So even if you're not a union member, every American owes something to America's labor movement."

Obama cited the 40 hour work week, minimum wage, paid leave, Social Security and Medicare as policies the labor movement helped put in place.

Turning to healthcare, the President once again expressed support for a public option but refused to draw a line in the stand.

"I continue to believe that a public option within the basket of insurance choices would help improve quality and bring down costs," he said.