A vote seen as a test of the power of populist nationalism in Europe was too close to call, with exit polls putting the two contenders neck and neck.

Karol Nawrocki, a right-wing nationalist, flipped exit poll results and defeated Warsaw Mayor Rafal Trzaskowski.

Conservative Karol Nawrocki narrowly won Poland's presidential runoff election, beating Warsaw's liberal mayor, according to the final vote count. Nawrocki was backed by President Trump.