You generally see these stories come up when:

1) there is a looming election

2) the sitting government is going to lose the next election

https://www.ctvnews.ca/politics/liberal-minister-carolyn-bennett-announces-she-will-not-stand-for-re-election-1.6491993?cid=sm%3Atrueanthem%3Actvnews%3Atwittermanualpost&taid=64beb6e31dc57500018aa04a&utm_campaign=trueAnthem%3A+New+Content+%28Feed%29&utm_medium=trueAnthem&utm_source=twitter