Politicians love making promises during election campaigns, often with explicit deadlines on when said promise would come to fruition. But are there examples in recent history where a politician (or even an entire party) has resigned after failing to fulfill their electoral promise? To clarify I'm looking for examples where:

  • A specific, verifiable promise was made by a politician or political party. Something like “Our GDP will double in 5 years!”
  • The promise failed to materialize
  • The politician/party in question announced that they're resigning due to failing to keep up their promise
  • The resignation was not due to external factors beyond the control of said politician. I.e. claiming to resign for breaking ones promise after having lost the latest election doesn't count.

Is this a crazy concept or did this actually happen in history?