Charges were filed secretly in recent months. A case against Mr. Assange could have implications for the special counsel inquiry as well as the publication of government secrets.
Both sides wrapped up their cases in the trial of the longtime Trump adviser Roger J. Stone Jr., accused of lying about his contacts with WikiLeaks during the 2016 campaign.
The testimony seemed to bolster the prosecution’s contention that Roger Stone, an ex-Trump campaign aide, deliberately lied to congressional investigators.