A subpoena has been issued demanding Robert Mueller's full report into Russia's alleged meddling during the 2016 US Presidential election.
It comes as claims grow that the current redacted version "leaves most of Congress in the dark."
However the Department of Justice has labelled the subpoena "premature and unnecessary".
The Department said it would "continue to work with Congress to accommodate its legitimate requests consistent with the law and long-recognized executive branch interests".
US President Donald Trump and his legal team claim the findings of the report fuller exonerate the president.

Trump signs bill to release Epstein files
Ex-Philippine mayor Alice Guo given life sentence for human trafficking
Trump to meet NYC mayor-elect Mamdani at White House on Friday
Indonesia evacuates stranded climbers after Semeru volcano erupts
