This report has examined the impact of the Russian invasion of Ukraine on the state of the pan-European populist Radical Right. Such parties are generally considered admirers of Russia and Vladimir Putin’s regime, and ties between the Kremlin and the European populist Radical Right parties have grown stronger over the last decade. Because of such ties, the Russian invasion of Ukraine has presented new challenges for radical right-wing populist parties, putting many of them under strain and forcing them to adapt to the new context produced by the war. In this report, we have asked how such parties have navigated the new context and the impact it may have had on them. Special attention has been paid to the reactions of right-wing populist parties to this war and the political and electoral consequences of the conflict for such parties. The analysis in this report includes a total of 37 populist Radical Right parties across 12 West European and 10 East European countries, plus Turkey. By looking first at the “supply side” of radical right-wing populist politics in the context of the Ukraine war, the report has provided an in-depth examination of the diversity of such actors’ positions vis-à-vis Russia, NATO, and the EU before the war and the different arguments and rhetoric they have used to interpret the war. The report has also examined how populist Radical Right parties have sought to exploit war-related issues for electoral gain, turning to domestic socioeconomic issues or cultural and historical legacies, calling for national sovereignty while adopting anti-elite strategies against their political opponents. Meanwhile, turning to the “demand side” of populism, the report’s country chapters have looked at how the invasion may have affected the public perception of radical right-wing populist parties and leaders, the impact the war may have had on the popularity or electoral support for those parties, and how that support fits with the public opinion at large on the war. The report has also sought to assess the invasion’s temporary and potentially permanent effects on right-wing populist politics. In sum, by looking at both the “supply” and “demand” side of radical right-wing populism in the context of the Ukraine war across 23 European countries, this cross-national analysis provides an in-depth examination of the diversity of such actors concerning their positions vis-à-vis Russia, NATO, and the EU before the war, and the different ways in which these parties have “performed” the war in Ukraine, the type of arguments and rhetoric they used, and how they may have exploited war-related issues (e.g., energy, prices, climate, and defense).