MORE: "We are taking all the precautions we can to...allow that testimony to go forward in a way that protects the whistleblower's identity," Schiff adds.

"With the president issuing threats...you can imagine the security concerns here." https://t.co/S0bTTDJUSL https://t.co/kwTh5DP1vR

— This Week (@ThisWeekABC) September 29, 2019