Abstract
This article intends to analyze Ukraine’s Constitutional Court in the light of the tolerance interval theory and the backlash thesis, through a case study, which is, the decision issued on October 27, 2020, that held unconstitutional part of the powers of the National Agency for the Corruption Prevention (NAPC). Three comorbidities — particular conditions that weaken the court and render it vulnerable to attacks — in the Ukrainian system are presented: Ukrainian democracy, autocracies tendencies in the presidency, and lack of public confidence in the judicial system. Through the adoption of a Comparative Constitutional Law approach, an index measuring the impact of the ruling is developed and calculated, allowing a comparison of the consequences to other notable controversial rulings in the world. After discussing the findings, the article concludes with some reflections and predictions on the longevity of the Ukrainian Constitutional Court.