President Trump Donald John TrumpFederal prosecutor speaks out, says Barr 'has brought shame' on Justice Dept. Former Pence aide: White House staffers discussed Trump refusing to leave office Progressive group buys domain name of Trump's No. 1 Supreme Court pick MORE's top envoy to North Korea is reportedly the likely nominee to take over the No. 2 role at the State Department.

The Associated Press reported Monday that Stephen Biegun is expected to be nominated for the position of deputy secretary of State, citing Trump administration officials and a congressional aide familiar with the president's plans.

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Biegun would replace John Sullivan, who has been nominated to serve as the next U.S. ambassador to Russia. Sullivan's confirmation hearing has been scheduled for Wednesday, according to the AP.

The State Department is one of several agencies thrust into the center of Democrats' impeachment inquiry following news that President Trump's personal lawyer Rudy Giuliani Rudy GiulianiThe Hill's Campaign Report: GOP set to ask SCOTUS to limit mail-in voting CIA found Putin 'probably directing' campaign against Biden: report Democrats fear Russia interference could spoil bid to retake Senate MORE went around State Department officials to set up a "shadow" policy on Ukraine.

Biegun is likely to face questions about that topic as well as efforts to prevent Russian election interference in his own confirmation hearings, and the AP reports that he is also expected to remain involved with the president's efforts to negotiate with the government of North Korea if confirmed to the post.

The State Department declined to comment on Biegun's expected nomination Monday night.