Poland, a leading example of economic growth and increased military spending in Europe, will vote in a presidential runoff Sunday in a race that remains too close to call.

Poland was voting on Sunday in a tight presidential election that will determine whether the country cements its place in the mainstream of the European Union or turns toward Donald Trump-style nationalism.

The liberal mayor of Warsaw, Rafal Traskowski, is up against the firebrand nationalist Karol Nowicki. The race has big implications for Poland's centrist first-term coalition government's agenda.