"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.

Six top congressional Democrats led by House Speaker Nancy Pelosi and Senate Minority Leader Chuck Schumer rejected Attorney General William Barr's offer to give them access to a less-redacted version of the report. In a letter to Barr, they repeated their demand the full report be given to Congress, but said they were open to "a reasonable accommodation."

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

By Doina Chiacu and David Morgan

WASHINGTON (Reuters) - Congressional Democrats on Friday took legal action to get hold of all of U.S. Special Counsel Robert Mueller's evidence from his inquiry into Russian meddling in the 2016 election, as the probe's findings hit President Donald Trump's poll ratings.

The number of Americans who approve of Trump dropped by 3 percentage points to the lowest level of the year following the release of a redacted version of Mueller's report on Thursday, according to a Reuters/Ipsos online opinion poll.

Mueller did not establish that the Trump campaign coordinated with Russians but did find “multiple acts by the President that were capable of exerting undue influence over law enforcement investigations.”

While Mueller ultimately decided not to charge Trump with a crime such as obstruction of justice, he also said that the investigation did not exonerate the president, either.

U.S. House of Representatives Judiciary Committee Chairman Jerrold Nadler, a Democrat, issued a subpoena to the Justice Department to hand over the full Mueller report and other relevant evidence by May 1.

"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 investigation, giving Democrats plenty of political ammunition against the Republican president but no consensus on how to use it.

The document has blacked out sections to hide 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.

Six top congressional Democrats led by House Speaker Nancy Pelosi and Senate Minority Leader Chuck Schumer rejected Attorney General William Barr's offer to give them access to a less-redacted version of the report. In a letter to Barr, they repeated their demand the full report be given to Congress, but said they were open to "a reasonable accommodation."

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

U.S. Senator Elizabeth Warren became the first major contender for the Democratic 2020 presidential nomination to call for the start of impeachment proceedings, saying on Twitter that "the severity of this misconduct" demands it.

"To ignore a President’s repeated efforts to obstruct an investigation into his own disloyal behavior would inflict great and lasting damage on this country," she said.

CRAZY MUELLER REPORT'

Trump, who has repeatedly called the Mueller probe a political witch hunt, lashed out again on Friday.

"Statements are made about me by certain people in the Crazy Mueller Report...which are fabricated & totally untrue," Trump wrote on Twitter.

He seemed to be referring to former White House counsel Don McGahn who was cited in the report as having annoyed Trump by taking notes of his conversations with the president.

"Watch out for people that take so-called “notes,” when the notes never existed until needed." Trump wrote, "it was not necessary for me to respond to statements made in the “Report” about me, some of which are total bullshit & only given to make the other person look good (or me to look bad)."

Phone conversations between the president and McGahn in June 2017 were a central part of Mueller's depiction of Trump as trying to derail the Russia inquiry. The report said Trump told McGahn to instruct the Justice Department to fire Mueller. McGahn did not carry out the order.

In analyzing whether Trump obstructed justice, Mueller revealed details about how the president tried to fire him and limit his investigation, kept details of a June 2016 meeting between senior campaign officials and a Russian under wraps, and possibly dangled a pardon to a former adviser.