Warsaw’s liberal mayor and his insurgent populist challenger are locked in a dead heat as they fight for the presidency of Poland, exit polls projected after Sunday’s head-to-head vote, leaving the country tilting between two wildly different political futures.

An exit poll in Poland’s presidential runoff on Sunday shows the two candidates are very close and that the race is still too close to call. The results could set the course for the nation’s political future and its relations with the European Union.

Liberal Warsaw Mayor Rafał Trzaskowski is slightly ahead of nationalist Karol Nawrocki, but within the exit poll’s margin of error..