Aiding Ukraine in the Russian war: unity or new dividing line among Europeans?

Abstract The Russian invasion of Ukraine has caused a seemingly high level of unity amongst Europeans in support of Ukraine. However, this article uncovers some inter- and intra-country fault-lines in public opinion across and within 16 EU countries and the UK regarding pro-Ukraine aid initiatives by using a two-wave design with data from the EUI-YouGov survey conducted in April and September 2022. Findings show that support is relatively stable but varies a lot depending on the specific measure and between countries. We uncover lowest support for measures that go against the self-interest of Europeans such as deploying troops and accepting higher energy costs. Frontrunners of Ukraine support are geographically close to Russia and located in both Western and Eastern Europe (though not exclusively), whereas laggards are countries of Eastern and Southern Europe with a history of Russian ties during the Cold War. Yet within countries, Ukraine support does not follow a simple pre-determined ideological pattern of the left and right. Most countries with lower overall support for Ukraine display a higher level of polarization between supporters of the incumbent versus the opposition party. Understanding these fault-lines is important for insights on current and future levels of Ukraine aid across Europe.