Some Republicans critical of Special Counsel Robert Mueller’s probe into possible collusion between the Trump campaign and Russian officials have claimed the initial FBI probe was triggered by Steele’s dossier.

They have raised questions about whether the FBI may have relied on the Steele document to improperly obtain surveillance warrants to spy on Trump’s campaign associates.

Simpson’s testimony before the Senate Judiciary Committee in August contradicted those claims.

“They had other intelligence about this matter from an internal Trump campaign source and ... they believed Chris’ information might be credible,” Simpson testified. “I think it was a voluntary source, someone who was concerned about the same concerns we had.”

Fusion GPS founder testified Trump associate went to FBI over Russia concerns | Reuters