This is a memo from White House staffer Mike Manatos (their legislative affairs contact for Senate offices) to his boss Larry O’Brien (the overall head of legislative affairs) dated March 13, 1963 regarding the pending mass transit bill. The memo contains an estimated vote count in the Senate Banking Committee and discussion of how to keep Commerce Committee chairman Warren Magnuson (D-WA) on board.

From the “Mass Transit” folder in Box 9-1 of the Office Files of Mike Manatos collection in the Lyndon Johnson Presidential Library.