The subpoena, seen by and labeled a "hit list" by the news website Axios, asks for all texts, letters, handwritten notes, or communications of any kind starting from November 1, 2015, between one unnamed witness and the following people:
Carter Page, a former investment banker and campaign foreign-policy adviser.
Corey Lewandowski, a Trump campaign manager.
Hope Hicks, Trump's outgoing communications director.
Keith Schiller, Trump's former bodyguard and confidant.
Michael Cohen, the longtime personal attorney for Trump.
Paul Manafort, Trump's already indicted campaign chairman.
Rick Gates, the deputy chairman of Trump's presidential campaign who is now cooperating with Mueller.
Roger Stone, an adviser to Trump who left the campaign before November 1, 2015, but has admitted to having contact with WikiLeaks, the organization that leaked hacked emails from the Democratic National Convention.
Steve Bannon, the former White House chief strategist under Trump.
And, finally, Donald Trump himself makes the list.
November 1, 2015, the start of the subpoena's request, came nearly five months after Trump announced his candidacy.