A brief meeting (sometimes only several seconds) in which no business is conducted. It is held usually to satisfy the constitutional obligation that neither chamber can adjourn for more than three days without the consent of the other.
Pro forma sessions can also be used to prevent the President from making recess appointments, pocket-vetoing bills, or calling the Congress into special session. During a 2007 recess, for example, Senate Majority Leader, Harry Reid, planned to keep the Senate in pro forma session in order to prevent further controversial appointments made by the Bush Administration. Said Reid: “I am keeping the Senate in pro forma [session] to prevent recess appointments until we get this process on track.”