(ROUGH CUT - NO REPORTER NARRATION) U.S. Special Counsel Robert Mueller has found no evidence of collusion between President Donald Trump's election team and Russia in the 2016 election but left unresolved the question of whether Trump had tried to obstruct justice by undermining investigations that have dogged his presidency.

Even though Mueller's findings were inconclusive over whether Trump had sought to influence the probes, U.S. Attorney General William Barr said in a summary released on Sunday (March 24) that the special counsel had not found enough proof to warrant bringing obstruction charges against Trump.

Now the chairman of the U.S. House of Representatives Judiciary Committee, Jerrold Nadler, is calling on Barr to testify.

"We will ask the Attorney General to testify before the House Judiciary Committee.

We will demand the release of the full report.

The American people are entitled to a full accounting of the President's misconduct referenced by the Special Counsel," Nadler said at a New York news conference on Sunday.

The release of the summary is likely to ignite a new political fight in Washington as Trump seizes on the findings as vindication of his assertion that he was the victim of a witch hunt, and as Democrats push for Barr to release the full report.

"Earlier this month the House passed a resolution calling for full and complete release of the Special Counsel's report by a vote of 420 to nothing," Nadler said.

"We now call on the Attourney General to honor that request, to release the report and the underlying evidence, and to appear before the Judiciary Committee to answer our questions without delay."