President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE spoke to newly elected Ukrainian president Volodymyr Zelenskiy Sunday night, according to the White House, and described the comedian's win as an "important moment" in the nation's history.

Trump congratulated Zelenskiy for the win and highlighted the peaceful and democratic election process, officials said.

Trump also emphasized the U.S.'s support of Ukraine's territorial sovereignty and indicated willingness to work with the newly elected president to "strengthen democracy, increase prosperity, and root out corruption," according to the White House press office.

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Zelenskiy, a political newcomer who plays a president on television, defeated incumbent President Petro Poroshenko by a landslide Sunday, according to exit polls.

Zelenskiy received 73.2 percent of the nationwide vote, while Poroshenko received 25.3 percent.

Zelenskiy campaigned on few detailed policies, but promised to root out corruption in Ukrainian politics.

Poroshenko, a chocolate magnate, has faced allegations of corruption.