WASHINGTON — Special counsel Robert Mueller served U.S. President Donald Trump’s election campaign a subpoena in mid-October, according to two people familiar with the matter, in the latest sign that his criminal investigation is aggressively pursuing links between campaign officials and Russia.
The subpoena to more than a dozen campaign officials sought documents related to any contacts they had with Russian operatives, according to one of the people who requested anonymity to speak about sensitive matters.
One of the people described the subpoena as relatively routine and an effort by Mueller to ensure his investigators have access to all the materials they have previously sought. Mueller requested some new supplemental materials but the subpoena doesn’t represent opening a new line of investigation, this person said.
The other person, however, cautioned against interpreting the subpoena as a sign that Mueller isn’t opening new components of the probe. The existence of the subpoena was reported earlier Thursday by The Wall Street Journal.
