Former GOP House Speaker Newt Gingrich said Thursday that President Trump made the biggest mistake of his presidency this week, but has still been tougher on Russia than former President Barack Obama "ever dreamed of."

Gingrich pushed back on Trump Monday after the president cast doubt on the U.S. intelligence community's conclusion that Russia hacked the DNC's emails in 2016 as part of a broader effort to undermine the election.

President Trump must clarify his statements in Helsinki on our intelligence system and Putin. It is the most serious mistake of his presidency and must be corrected—-immediately. — Newt Gingrich (@newtgingrich) July 16, 2018

Trump later clarified the remark and told CBS News on Wednesday that he holds Vladimir Putin personally responsible for the meddling. Gingrich said he's glad Trump corrected the record and that he hopes Trump "learned something" from his mistake in Helsinki.

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"He was too enthusiastic. He spent too many hours with Putin," Gingrich said, proceeding to lay out the steps taken against Russia since Trump took office.

Gingrich called out former Obama administration officials James Comey, James Clapper and John Brennan for bashing Trump after they failed to stop the Russian meddling in 2016.

Clapper, the former director of national intelligence, said this week he continues to wonder whether the Russians have compromising information on Trump.

Former FBI Director Comey called on Americans to vote for Democrats, while Brennan, the former CIA director, said Trump's comments in Helsinki were "treasonous."

This Republican Congress has proven incapable of fulfilling the Founders’ design that “Ambition must ... counteract ambition.” All who believe in this country’s values must vote for Democrats this fall. Policy differences don’t matter right now. History has its eyes on us. — James Comey (@Comey) July 18, 2018

Donald Trump’s press conference performance in Helsinki rises to & exceeds the threshold of “high crimes & misdemeanors.” It was nothing short of treasonous. Not only were Trump’s comments imbecilic, he is wholly in the pocket of Putin. Republican Patriots: Where are you??? — John O. Brennan (@JohnBrennan) July 16, 2018

Gingrich said all three men do not want Americans to notice their failures and the "weakness of the Obama administration."

"They were in charge of national security, they failed and they're now hysterical trying to get us to look at Trump," he said on "America's Newsroom."

Watch the full discussion above and see Gingrich's latest op-ed at FoxNews.com.

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