Democrats in Congress will subpoena the full report of special counsel Robert S. Mueller III if the Justice Department only discloses certain parts of it, Sen. Richard Blumenthal said Thursday.

The Connecticut Democrat is a key member of the Senate Judiciary Committee. Republican Sen. Lindsey Graham of South Carolina is the committee’s chairman, and has subpoena power over the Justice Department.

CNN reported Wednesday that Mueller could issue a report on Russian interference in the 2016 U.S. elections as early as next week, though the special counsel’s notoriously tight-lipped office has provided no timeline for its plans.

[Brett Kavanaugh could decide how redistricting is done]

Newly confirmed Attorney General William Barr was noncommittal in his confirmation hearing about whether he would allow Mueller to testify before Congress, and whether he would resist a subpoena for the special counsel’s report.