Poles are voting Sunday in a presidential election at a time of heightened security concerns stemming from the ongoing war in neighboring Ukraine and growing worry that the U.S. commitment to Europe’s security could be weakening under President Donald Trump. The top two front-runners are Warsaw Mayor Rafał Trzaskowski, a liberal allied with Prime Minister Donald Tusk, and Karol Nawrocki, a conservative historian with no prior political experience who is supported by the national conservative Law and Justice party. Sławomir Mentzen, a hard-right candidate who blends populist MAGA rhetoric with libertarian economics and a critical stance toward the European Union, has been polling in third place.