Glenn Simpson, co-founder of Fusion GPS, the firm behind the debunked ‘Russian dossier’ to smear Trump refused to tell Congress who the political sources are that commissioned the salacious document.

The Daily Caller reported:

Fusion GPS also stands behind the dossier, a lawyer for the firm said at the end of a 10-hour interview given by co-founder Glenn Simpson. “Mr. Simpson told Congress the truth and cleared the record on many matters of interest to congressional investigators. He also kept the identities of Fusion GPS’ clients confidential,” Josh Levy, Simpson’s attorney, told The Daily Caller in a statement. Simpson appeared for the interview after weeks of negotiations between his attorneys and the committee, which is one of three congressional panels investigation potential collusion between the Trump campaign and Russian government.

TRENDING: Black Lives Matter Activist Wearing 'Justice for Breonna Taylor' Shirt Walked into a Louisville Bar and Murdered Three People

Here is more background on the now-discredited Trump Dossier.

With just ten days to go before he was sworn in as America’s forty-fifth president, the political establishment went nuclear on President-elect Donald Trump with a double-barreled blast of “leaked” “intelligence” reports by CNN and BuzzFeed.

The documents contained explosive, but unverified, opposition research that alleged intel ties between Russia and Trump and also claims Russia holds sexual blackmail material over Trump.

One of the most outrageous unconfirmed allegations in the report claims the Russians recorded Trump watching Russian prostitutes urinate on each other in a Moscow hotel room previously occupied by President and Mrs. Barack Obama.

According to the “leaked” “intelligence” documents: Trump disliked Obama so much that he hired two Russian hookers to piss on a bed that Obama slept on in Russia.

On Monday, GPS Fusion founders have refused Rep. Nunes’ request to testify before the House Intelligence Committee. The founders cited constitutional privileges as their reason to refuse, claiming they cannot in good conscience appear before the panel.

Some news: Fusion GPS co-founders will invoke their constitutional privileges not to testify before the HPSCI after Nunes subpoena. Story TK pic.twitter.com/dLZ8iJypx9 — Natasha Bertrand (@NatashaBertrand) October 16, 2017

Fusion GPS' cofounders are using a 'novel legal argument' to punch back at Devin Nunes https://t.co/kkStAJyt30 via @PoliticsInsider — Charles Hogan (@charleshogan54) October 16, 2017

Business Insider reports: