Refuting President Donald Trump’s “arrogant” assumption that the Russia investigation will be over at the end of the year, members of special counsel Robert Mueller’s team confirmed they would continue their probe until at least 2018.

As The Washington Post reported Monday, “the special counsel’s office has continued to request new documents related to the [Trump] campaign, and members of Mueller’s team have told others they expect to be working through much of 2018, at a minimum.”

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The possibility of the probe ending by the year’s close becomes even narrower considering that multiple witnesses, including former Trump aides George Papadopoulos and Mike Flynn, are continuing to cooperate with the investigation, the report continues.

Nevertheless, CNN reported Monday that Trump believes he’s going to receive an exonerating “letter” from Mueller — and those close to him fear he’ll have a “meltdown” if that letter doesn’t come soon.