In a letter to Pence, Schiff (D-Calif.) asked the vice president to declassify supplemental testimony from the aide, Jennifer Williams, about Pence’s Sept. 18 phone call with Ukrainian President Volodymyr Zelensky, arguing that there is no “legitimate basis” to keep it secret.

“The Office of the Vice President’s decision to classify ‘certain portions’ of the Sept. 18 call … cannot be justified on national security or any other legitimate grounds we can discern,” Schiff wrote to Pence, requesting a response by Dec. 11.

Schiff indicated that Williams recalled the relevant information about Pence’s phone call after her closed-door deposition on Nov. 7 and wished to convey it to impeachment investigators. The letter indicates Williams submitted the supplemental filing on Nov. 26, a week after she testified publicly.