Schiff, chairman of the House Intelligence Committee, said in a letter to Rep. Devin Nunes (R-Calif.), the committee’s top Republican, that the whistleblower’s testimony would be “redundant and unnecessary” given the mounting evidence corroborating the whistleblower’s complaint. CNN published Schiff’s letter on Saturday night.

“The impeachment inquiry … has gathered an ever-growing body of evidence ― from witnesses and documents, including the President’s own words in his July 25 call record ― that not only confirms, but far exceeds, the initial information in the whistleblower’s complaint,” Schiff wrote. “In light of the President’s threats, the individual’s appearance before us would only place their personal safety at grave risk.”