The main area of sustained populist growth in recent decades has been Western Europe, where populist parties have not only endured longer than expected, but have increasingly begun to enter government. Focusing on three high-profile cases in Italy and Switzerland – the Popolo della Libertà (PDL), Lega Nord (LN) and Schweizerische Volkspartei (SVP) – is the first in-depth comparative study to examine whether these parties are indeed doomed to failure in office as many commentators have claimed. Albertazzi and McDonnell’s findings run contrary to much of the received wisdom. Based on extensive original research and fieldwork, they show that populist parties can be built to last, can achieve key policy victories and can survive the experience of government, without losing the support of either the voters or those within their parties. Contributing a new perspective to studies in populist politics, is essential reading for undergraduate and postgraduate students, as well as scholars interested in modern government, parties and politics.