Their conclusion:
Our ruling
Reid has said Romney paid no taxes for 10 years. It was no slip of the tongue. He repeated the claim on at least two more occasions, at one point saying that "the word is out" when in fact it was only Reid who put that "word" out.
Reid has produced no evidence to back up his claim other than attribution to a shadowy anonymous source. Romney has denied the claim, and tax experts back him up, saying that the nature of Romney's investments in Bain make it highly unlikely he would have been able to avoid paying taxes altogether -- especially for 10 years.
Reid has made an extreme claim with nothing solid to back it up. Pants on Fire!
Harry Reid's blatant lies reek of desperation and shows exactly how much trouble the Democratic party leaders believe Obama's reelection campaign is in.
They are scared to talk about jobs and the economy, they have no actual ammunition left against Romney because they have thrown everything but the kitchen sink at him and it hasn't lowered his polls numbers at all, so they are forced to create outright lies to try to attack with.
Related:
Wapo Post Partisan: Reid Draws Democratic Party And Obama Into The Gutter
Reince Priebus: Sen. Harry Reid Is a ‘Dirty Liar’
John Sununu: Barack Obama behind Harry Reid’s claim
Harry Reid's Latest Pathetic Lies About Romney Show Democrats In Full Panic Mode