Who are the "Forty-seven percent of Americans" who Republican presidential candidate Mitt Romney says pay no income tax?
A study by the nonpartisan Tax Policy Center says 46 percent of U.S. households paid no federal income tax last year.
Some got senior citizens tax breaks, some are low-income and some got tax breaks for college tuition.
The study says among all who don't owe, 9 out of 10 make $50,000 or less. But 4,000 households earning more than $1 million a year didn't pay federal income tax last year.