Conservative commentator Mark Levin lashed out against the Democrats in the aftermath of special counsel Robert Mueller submitting his final report to the Justice Department.

During his Fox News show Sunday, the nationally syndicated radio host blamed former President Barack Obama's government for seeding a Russian collusion frenzy and called for an investigation into their role in peddling the narrative.

"The Democratic Party is not a pro-America party. They act like a third-world party because they want to destroy this presidency," Levin said. "It is time to focus on the Democrats in the House. It is time to focus on the media, the Hillary campaign, the DNC, Barack Obama — this was Barack Obama’s government that did all this when the Russians were interfering in our election."

"They put spies in [Trump's] campaign, they abused the FISA court system. This country doesn't belong to Adam Schiff, and [House Judiciary Committee Chairman Jerrold] Nadler and [House Speaker Nancy] Pelosi."

Following Attorney General Bill Barr's submitting a four-page letter to Congress summarizing Mueller's findings, including finding no evidence of collusion between the Trump campaign and Russia, Levin said Democrats owe Trump an apology for repeated allegations, including House Intelligence Committee Chairman Adam Schiff, D-Calif. A growing number of Republicans have called on Schiff to step down from his role as chairman.

Barr sent a letter to the leaders of the Senate and House Judiciary Committees on Sunday briefing them of the “principal conclusions” in special counsel Robert Mueller’s Russia investigation.

The letter, which is four pages long, said Mueller found no evidence of collusion between the Trump campaign and Russia. Mueller also declined to determine whether Trump obstructed justice, and Barr said he and Deputy Attorney General Rod Rosenstein concluded there was insufficient evidence to show the president committed a crime.

Democrats are now calling on the Justice Department to release the full Mueller report and underlying documents. Some Republicans, including House Intelligence Committee ranking member Devin Nunes, have gone further, pushing for the release of the Mueller scope memo and documents related to FISA warrants.