In U.S. politics, a lame duck session refers to any meeting of Congress that occurs after the November general election but before the new Congress is sworn in on January 3. The term "lame duck" describes members who have lost re-election, retired, or otherwise will not serve in the next Congress, yet retain full voting power during this interim period. The phrase originated in 18th-century London financial markets, referring to bankrupt traders, and was applied to politicians by the mid-19th century in the United States.
Lame duck sessions became a structural feature of American government after the Twentieth Amendment (ratified 1933) moved the start of new congressional terms from March 4 to January 3, shortening but not eliminating the post-election window. Before the amendment, outgoing Congresses sometimes sat for four months after an election.
These sessions are politically significant because:
- Departing members may vote on controversial legislation without facing electoral consequences.
- The outgoing majority party may push through priorities before losing control.
- Confirmations, budget deals, and treaties are frequently handled to avoid leaving them to a differently composed incoming Congress.
Notable examples include the 2010 lame duck session, in which Congress repealed Don't Ask, Don't Tell and ratified the New START treaty with Russia, and the 2022 lame duck session, which passed the Respect for Marriage Act and the Electoral Count Reform Act.
The term is also used more broadly for any executive or legislative actor in the interval between losing power and formally leaving office, including U.S. presidents between November and the January 20 inauguration. Critics argue lame duck legislating undermines democratic accountability, since voters have already rendered judgment; defenders note that elected officials retain a constitutional mandate until their successors take office, and unresolved business must sometimes be addressed before the calendar year ends.
Outside the U.S., the concept applies loosely to any government continuing to operate after losing an election or mandate, pending transition.
Example
During the 2010 lame duck session of the 111th Congress, lawmakers ratified the New START arms control treaty with Russia and repealed the "Don't Ask, Don't Tell" policy before the incoming Republican House majority took office.
Frequently asked questions
The phrase comes from 18th-century London stock exchange slang for a defaulting trader, and was later adapted in 19th-century America to describe officeholders whose political power had effectively expired.
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