Judicial Watch President Tom Fitton said Monday that the Department of Justice inspector general's report on Andrew McCabe shows that "the obstruction investigation against President Trump is dead."

"The idea that [Trump] obstructed justice by firing [former FBI director James] Comey to protect [former national security adviser Michael] Flynn or whatever ... if Comey's the key witness, boy, what a joke of a prosecution that would be," Fitton said.

Fitton said on "Outnumbered Overtime" that both Mueller and Comey are two senior law enforcement officers who would not be publicly discussing an obstruction investigation into the president if they thought it was a serious probe.

"What is the Justice Department doing to allow [Special Counsel Robert] Mueller to mess around, given that Comey was behind the creation of Mueller's [Russia] investigation to begin with?" he asked.

The bombshell report on McCabe from DOJ Inspector General Michael Horowitz discusses how the agency's former deputy director authorized an information leak about the probe to the Wall Street Journal, and then misled investigators about the leak soon after.

Fitton said the report shows confirmation of an effort by the Justice Department -- then run by former attorney general Loretta Lynch -- to squelch an investigation into the Clinton Foundation in 2016.

He said that going forward, there will be large amount of interest into how the the investigation of the Clinton Foundation was handled and whether or not there was improper political intervention.

The report states, in part, "We concluded that McCabe’s decision to confirm the existence of the [Clinton Foundation] investigation through an anonymously sourced quote, recounting the content of a phone call with a senior department official in a manner designed to advance his personal interests at the expense of department leadership, was clearly not within the public interest exception."

"I don't understand why the Justice Department hasn't reinvigorated or refocused resources on this, the way they have with this improper targeting of President Trump," he said.