But PolitiFact wrote that it is "far-fetched" to believe Romney paid no taxes for 10 years. Further, the article stated the obvious -- "Reid has produced no evidence to back up his claim other than attribution to a shadowy anonymous source." 

PolitiFact concluded: "Reid has made an extreme claim with nothing solid to back it up." They gave the accusation a "Pants on Fire!" rating. 

The Washington Post's fact-check column, too, gave Reid's remark the equivalent of a "Pants on Fire!" score. The Post gave it "four Pinocchios," which is the newspaper's score for a claim they knock down. 

"Without seeing Romney's taxes, we cannot definitively prove Reid  incorrect. But tax experts say his claim is highly improbable. Reid also has made no effort to explain why his unnamed source would be credible. So, in the absence of more information, it appears he has no basis to make his incendiary claim," the Post wrote.