Co-founder of firm behind dossier tying Trump to Russia testifying next week

The co-founder of the firm who ordered a salacious dossier on President Trump will testify before the Senate Judiciary Committee next week.

Glenn Simpson’s opposition research firm, Fusion GPS, hired former British spy Christopher Steele to investigate then-candidate Trump.

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The dossier produced by Steele claims Trump and the Kremlin had worked together to undermine Democratic presidential nominee Hillary ClintonHillary Diane Rodham ClintonYoung Turks founder says Democrats should avoid repeat of 2016 and pick a progressive Young Turks founder says Democrats should avoid repeat of 2016 and pick a progressive Trump highlights polls that showed Clinton beating him by double digits MORE’s campaign.

The unsubstantiated findings in the dossier were released to media outlets and published by BuzzFeed in January.

Simpson will testify before the committee on Wednesday. 

Senate Judiciary Chairman Chuck GrassleyCharles (Chuck) Ernest GrassleyOvernight Defense: Pompeo blames Iran for oil tanker attacks | House panel approves 3B defense bill | Trump shares designs for red, white and blue Air Force One On The Money: Pelosi says no debt ceiling hike until deal on spending caps | McConnell pressures White House to strike budget deal | Warren bill would wipe out billions in student debt | Senate passes IRS reform bill On The Money: Pelosi says no debt ceiling hike until deal on spending caps | McConnell pressures White House to strike budget deal | Warren bill would wipe out billions in student debt | Senate passes IRS reform bill MORE (R-Iowa) demanded details on the dossier in a letter last May, and threatened to subpoena Fusion GPS in June.