President Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE has selected a nominee for ambassador to South Korea and is waiting on his approval from Seoul, Yonhap News Agency reported Sunday.

Victor Cha, a North Korea expert and former National Security Council official under former President George W. Bush, has already undergone extensive vetting and is now in the final stages of approval, the agency reported.

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Sources told the news outlet that they expect the South Korean government to approve Cha quickly, as the post has been empty since Trump took office in January.

Cha's reported nomination comes amid growing concerns over North Korea, which in November launched its first intercontinental ballistic missile in two months.

Following the most recent launch, Trump told reporters that "it's a situation we will handle," without elaborating on what exactly that meant.

Secretary of State Rex Tillerson Rex Wayne TillersonGary Cohn: 'I haven't made up my mind' on vote for president in November Kushner says 'Alice in Wonderland' describes Trump presidency: Woodward book Conspicuous by their absence from the Republican Convention MORE at the time condemned the launch but said diplomatic options "remain viable and open, for now."

Yonhap's report came the same day a United Nations official emphasized the need for a diplomatic solution to the conflict after returning from a visit to North Korea.