Fox News senior political analyst Brit Hume said the past two years of media coverage of the Mueller investigation and the Trump-Russia collusion narrative has amounted to "the worst journalistic debacle" of his lifetime.

Attorney General William Barr released the "principal conclusions" of Mueller's Russia probe in a four-page letter to lawmakers Sunday, which stated definitively that Mueller did not establish evidence that Trump's team or any associates of the Trump campaign had conspired with Russia to sway the 2016 election.

According to Barr's letter, however, Mueller's report did not reach a conclusion on whether Trump obstructed justice, and left that decision to Barr and officials at the DOJ -- who determined there was insufficient evidence of obstruction.

Hume agreed with Sen. Lindsey Graham (R-S.C.), who said moments earlier that Congress must look into how the investigation started in 2016. 

"It is the worst journalistic debacle of my lifetime and I've been in this business about 50 years. I've never seen anything quite this bad last last this long. It was a terrible thing and it needs to be investigated," Hume said.

He called on media organizations and newspapers to review how and why they spent so much time covering "utterly baseless speculation," in some cases culminating with accusations of treason against the president.

Hume said leading members of the media must do some "soul-searching," but so far he is not seeing that type of "introspection" from many since the conclusion of the Mueller probe.

He said, instead, there is now speculation about an obstruction of justice case still materializing.

"I think that's yet another wild goose chase," he said on "America's Newsroom."

Watch the full analysis above.

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