A pro-European Union centrist pulled off an upset in Romania’s presidential election, beating out a hard-right nationalist who had channeled people’s anger at the political establishment to surge in the polls.

As Romania heads into a critical presidential runoff on Sunday between two starkly different candidates, many view the final vote as a geopolitical choice between East or West.

George Simion, a nationalist and vocal supporter of U.S. President Donald Trump, has won Romania’s first-round presidential election after capitalizing on widespread anti-establishment sentiment.