Conservative Karol Nawrocki has won Poland’s weekend presidential runoff election, according to the final vote count.

Karol Nawrocki, a historian and former boxer, will be Poland’s next president. Nationalist forces in the United States and Europe had been rooting for him: Mr. Nawrocki was supported by President Trump, Prime Minister Viktor Orban of Hungary and George Simion, a right-wing politician in Romania who recently lost a presidential election.

In a victory for European conservatives inspired by President Donald Trump, Nawrocki secured 50.89% of the vote, election commission data showed.