In a letter addressed to McConnell, Sens. Lindsey Graham (R-S.C.) and Jack Reed (D-R.I.), who also sit on the Senate Armed Services Committee, joined McCain and Schumer in calling for a select committee to investigate reports of Russian interference in the election.

“We share your respect for, and deference to, the regular order of the Senate, and we recognize that this is an extraordinary request,” the senators wrote. “However, we believe it is justified by the extraordinary scope and scale of the cyber problem. Democrats and Republicans must work together, and across the jurisdictional lines of the Congress, to address this unique challenge.”

This article has been updated with information about the letter from Lindsey Graham and Jack Reed.