Rudy Giuliani, former mayor of New York, speaks with reporters during the White House Sports and Fitness Day event on the South Lawn of the White House in Washington, D.C., U.S., on Wednesday, May 30, 2018. Al Drago | Bloomberg | Getty Images

Ukrainian President Volodymyr Zelensky listens during a meeting with US President Donald Trump in New York on September 25, 2019, on the sidelines of the United Nations General Assembly. Saul Loeb | AFP | Getty Images

Zelenskiy's early concern about pressure from Trump and his allies, expressed in the May 7 meeting with his advisers and Hochstein, was earlier reported by The Associated Press. The fact that those concerns were then quickly relayed to the White House National Security Council has never previously been reported. Bolton declined to comment. Hill, through her attorney Lee Wolosky, also had no comment. The White House did not immediately respond to a request for comment. The White House meeting also offers some of the first indications of what led Hill to conclude that Giuliani and Sondland were part of a squad running a "shadow Ukraine policy," as she later would testify to Congress. Sondland had no official role overseeing Ukraine, a country not part of the EU. Giuliani, Trump's personal lawyer, isn't even a government employee. Hill testified that Bolton later privately called Giuliani a "hand grenade" and described Sondland's push on Ukraine as part of a "drug deal." Hochstein declined to comment to NBC News on his White House meeting with Hill, which came up during her roughly 10-hour deposition in the House earlier this month. Hill resigned from her post over the summer.

Gordon Sondland, U.S. ambassador to the European Union, arrives to the Capitol for his deposition as part of the House's impeachment inquiry on Thursday, Oct. 17, 2019. Tom Williams | CQ-Roll Call, Inc. | Getty Images