Senate Majority Leader Harry Reid (D-Nev.) lost even more credibility on his claim that presidential candidate Mitt Romney didn't pay taxes for 10 years Thursday evening after one of the Congressman's aides gave out additional information on Reid's 'anonymous source' and then retracted the information within a matter of minutes.

Reid previously told The Huffington Post that an investor in Romney's old company Bain Capital told him Romney did not pay taxes for 10 years. Reid has provided no proof of the accusation and has refused to name his source despite criticism from Romney and independent fact-checkers for his suggestion that Romney is a liar and a criminal.

Now, The Huffington Post is reporting that a top Reid aide first told the publication that the source "is an investor in Bain Capital, a Republican also, and somebody who has been dealing with Romney's company for a long, long time and he has direct knowledge of this" but retracted the statement minutes after HuffPo held him accountable for his claim by publishing the new details.

"I do not know the party affiliation of the source, how long he invested with Bain, or his relationship to Romney beyond the fact that he was an investor with Bain Capital, as Senator Reid has previously stated," the aide, Jose Parra, said in an email to HuffPo reporter Ryan Grim, when it became clear that he made a no-no.

The latest details in the Reid-Romney-taxes saga reinforces Romney's claim that the Democratic Party leader "has lost a lot of credibility" in the last couple weeks since he began pushing this tall tale. No one besides Nancy Pelosi ever seemed to believe Reid's story was "true" in the first place, but Thursday evening's incident is another example of why Reid's remarks are seen as suspect.