Michael Mezey maintained that all legislatures are vulnerable to executiveattempts to aggrandise their power and influence at the expense ofparliamentary prerogatives. In democracies, populist leaders are a danger toparliaments. Therefore, I explored the role of populism as a factor in Mezey’sexplanation of legislative vulnerability using the case of the Israeli parliamentduring the 37th government. A wave of populism prompted an attempt tocreate a constitutional revolution that would weaken the already weakparliament. Israel is one example of the role of populism in makinglegislatures vulnerable to attempts by the executive branch to increase itspower, but there are more cases to study to understand the depth of thephenomenon. Thus, as researchers, we should identify the procedures thatcan help vulnerable parliaments confront populist leaders and their behaviour.