ABSTRACT This article provides the first systematic analysis of the confidence motion against the Conservative Party leadership of Boris Johnson in June 2022 and the mass ministerial resignations in July. I have constructed a dataset of the parliamentary Conservative Party and used logistic regression to test hypotheses relating to Conservative parliamentarians’ behaviour in the confidence motion and ministerial resignations. My findings demonstrate that the long-running divide within the Conservative Party on Europe was statistically significant in the confidence motion, with MPs who voted leave in the 2016 EU referendum being more likely to have confidence in Johnson. Ministers’ university education was also significant in driving support for Johnson. My research findings contribute to existing academic debates as they show how Conservative MPs’ behaviour in the downfall of Boris Johnson compares with the selection and ejection of other Conservative leaders. I also contribute to emerging discussions on Johnson’s leadership of the Conservative Party within the context of governing degeneration.
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