Fact-checking website Politifact — which has had a mixed recordrefereeing the election so far — gave Sen. Harry Reid a “pants-on-fire”rating for his charge that Mitt Romney didn’t pay taxes for 10 years.

In an Internal Revenue Servicestudy of nearly 4 million 2009 tax returns of filers reporting more than $200,000 in adjusted gross income, 20,752 of these taxpayers — or just 0.529 percent — had no U.S. income tax liability.