unforced error - definition and synonyms

noun
  1.   From our crowdsourced Open Dictionary
    1
    in tennis and other sports, an error that is just a mistake rather than the result of pressure from the opponent

    Anderson began the tiebreak with an unforced error.

    Submitted from United Kingdom on 14/07/2016
  2.   From our crowdsourced Open Dictionary
    2
    in politics or business, a mistake that is self-inflicted rather than being caused by outside pressure

    Could this be the unforced error the Republicans have been waiting for?

    Submitted from United Kingdom on 14/07/2016