By Doina Chiacu and David Morgan

WASHINGTON (Reuters) – Congressional Democrats on Friday demanded to see all of U.S. Special Counsel Robert Mueller’s evidence from his inquiry into Russian interference in the 2016 election, as they consider how to use the probe’s findings against President Donald Trump.

U.S. Attorney General William Barr, flanked by Acting Principal Associate Deputy Attorney General Edward O’Callaghan and Deputy Attorney General Rod Rosenstein, speaks at a news conference to discuss Special Counsel Robert Mueller’s report on Russian interference in the 2016 U.S. presidential race, in Washington, U.S., April 18, 2019. REUTERS/Jonathan Ernst

House of Representatives Judiciary Committee Chairman Jerrold Nadler, a Democrat, issued a subpoena to the Justice Department to hand over the full Russia report by Mueller, saying he cannot accept a redacted version released on Thursday that “leaves most of Congress in the dark.”

“My committee needs and is entitled to the full version of the report and the underlying evidence consistent with past practice. The redactions appear to be significant. We have so far seen none of the actual evidence that the Special Counsel developed to make this case,” Nadler said in a statement.

The report provided extensive details on Trump’s efforts to thwart Mueller’s Russia investigation, giving Democrats plenty of political ammunition against the Republican president but no consensus on how to use it.

The 448-page report painted a clear picture of how Trump had tried to hinder the probe but did not conclude that he had committed the crime of obstruction of justice, although it did not exonerate him.

The report blacked out details about secret grand jury information, U.S. intelligence gathering and active criminal cases as well as potentially damaging information about peripheral players who were not charged. Half a dozen former Trump aides were charged by Mueller’s office or convicted of crimes during the 22-month-long investigation.

The Democrats’ subpoena gives U.S. Attorney General William Barr until May 1 to produce the materials requested.

Democratic leaders played down talk of impeachment just 18 months before the 2020 presidential election, even as some prominent members of the party’s progressive wing, most notably U.S. Representative Alexandria Ocasio-Cortez, promised to push the idea.

Former FBI director Mueller also concluded there was not enough evidence to establish that Trump’s campaign engaged in a criminal conspiracy with Moscow to sway the 2016 election, a finding that has been was known since late March when Barr released a summary of what he described as Mueller’s principle conclusions.

(Reporting by David Morgan and Doina Chiacu; Additional reporting by Sarah N. Lynch and Andy Sullivan; Writing by Alistair Bell; Editing by Chizu Nomiyama and Grant McCool)