Washington (CNN) President Donald Trump will convene his Cabinet Monday morning for the first time since July, the first such meeting since House Democrats announced an impeachment inquiry.

The Cabinet meeting comes as the President is testing patience within his own party following his decision to withdraw troops from Syria, though Defense Secretary Mark Esper said Monday that some US troops will temporarily stay in the country to protect oil fields from ISIS. Esper, who is currently traveling overseas, will not be present for the meeting Monday.

The meeting comes during a crucial week for the impeachment inquiry with the nation's top diplomat in Ukraine, Bill Taylor, set to testify behind closed doors Tuesday, along with officials from the State Department and National Security Council scheduled to testify later this week.

There are also continued questions about the administration's strategy as acting chief of staff Mick Mulvaney faces fallout from his press conference last week , in which he said, then denied, that Trump held up an aid package to Ukraine in exchange for an investigation into an unsubstantiated theory that Ukraine, not Russia, was responsible for hacking Democratic Party emails in 2016. Trump has grown increasingly frustrated with Mulvaney, who already faced internal efforts to be ousted before the impeachment inquiry began, in the wake of his briefing room appearance.

Trump has faced unprecedented turnover in his administration and there are currently a few vacancies in his Cabinet. In addition to a full-time chief of staff, Trump has yet to nominate a Homeland Security Secretary, Energy Secretary or Director of National Intelligence.

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