Lame duck
WordNet
noun
(1) An elected official still in office but not slated to continue
WiktionaryText
Noun
- A person or thing that is helpless, inefficient or disabled.
- An elected official who has lost the recent election or is not eligible for reelection and is marking time until leaving office.
- Congressman Jones was a lame duck and did not vote on many issues that were important to his constituents.