The letter argues about the validity of the request, claiming that the request relates to confidential communications "which may be protected by the privilege of the executive and require careful consideration".
Burnison concludes by stating that the Department "continues to cling to Congress."
Outgoing Energy Minister Rick Perry has become aware of the role of the Ukrainian scandal in recent weeks, and his contact with Ukrainian officials has been the subject of concern the summons of House Democrats.
White House incumbent Chief of Staff Mick Mulvaney confirmed in a rare press conference on Thursday that President Donald Trump had instructed Perry at a meeting on May 23 at the Oval Office with his personal lawyer Rudy Giuliani regarding Ukraine to deal with.
Several witnesses in the impeachment investigation have testified that Giuliani interfered with Ukraine's foreign policy and in some cases bypassed the diplomatic process.
House Democrats He had also obtained documents on Perry's trip to Ukraine for the inauguration of President Volodymyr Zelensky, when Perry, on Trump's direction, headed the US delegation instead of Vice-President Mike Pence.
The refusal is the latest case in which the Trump administration has violated subpoenas of the House in the democratic impeachment investigation. unconstitutional, "and that it would not participate in the investigation.
The State Department, the Pentagon and the Office of Management and Budget have already failed to respond to the deadlines for summoning the House after the Democrats have received a large number of Documents requested in connection with the US freeze called for security assistance to Ukraine, urgency for Ukraine to investigate, and the ousting of former US ambassador to Ukraine, Marie Yovanovitch.
"The Ministry is currently not in the US Able to respond to your request for documentation, "said Robert Hood, deputy secretary of Defense for Legislative Affairs, on Tuesday to the three committees that led the impeachment investigation," The department understands the importance of your request for information and has taken steps to potentially identify, store and collect responsive documents. "[1
"We know of the additional witnesses who have said that there are additional documents that they have provided to the Ministry of Foreign Affairs. However, they have not been turned over to the Congress," House Secretary Intelligence Secretary Adam Schiff said Democrat from California this week.
While Democrats have been investigating to try and obtain the documents rejected by the Trump administration This time, they signal that they will take a different route: this disregard of subpoenas is evidence of the Congress's obstruction.
"We will consider failure to comply with subpoenas as evidence of the President's efforts to obstruct the impeachment investigation, and we may use this disability as additional evidence of the inaccuracy of the President's underlying wrongdoing," Schiff wrote in a letter to colleagues this week.
Republicans have defended Trump's decision not to participate in the investigation on the grounds that ship has not conducted a fair investigation.
"I think the (Republican House) conference is in complete agreement in the idea that we are" standing behind the President like the American people, "said Ohio Rep. Jim Jordan, the supreme Republican member of the House Oversight Committee "This investigation, as I just said, is unfair and partisan, and we see it as what it is."
It is likely that more summons will be sent from Capitol Hill to the executive if the impeachment investigation continues and more witnesses are being interviewed, and although the Trump administration has rejected subpoenas for documents, it remains to be seen whether top officials likely to see Democrats catch up with testimony by White House reigning chief of staff Mick Mulvaney, the soon-to-be former energy secretary Rick Perry, and among them the former National Security Advisor John Bolton – will appear when they receive subpoenas.  This story has been updated.