Former President Obama re-entered the political fray in a speech last week, and he's taking some criticism for accusing Republicans of embracing "wild conspiracy theories, like those surrounding Benghazi, or my birth certificate."

Obama made the remark in a speech Friday, claiming that the politics of "division and resentment and paranoia" has found a home in the Republican Party.

On "America's Newsroom" on Monday, Jason Chaffetz slammed Obama for being dismissive of the 2012 terror attack on a U.S. diplomatic compound in Benghazi, Libya, which left four Americans dead.

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Chaffetz, a Fox News contributor and former Utah congressman, pointed out that it was Obama who decided on U.S. intervention in Libya, and Obama eventually acknowledged the "worst mistake" of his presidency was failing to properly plan for that intervention.

He said Obama failed to protect the Americans stationed at the Benghazi compound and he failed to act in the aftermath of the deadly attack, and now he cannot "rewrite history."

"It is offensive to the men and women who served in Libya, who served this country and who serve in the United States military, because that president -- President Obama -- failed to act," said Chaffetz, who chaired the House Oversight Committee from 2015 to 2017 and led investigations into the attack.

"He is fundamentally and totally and fully wrong. ... Shame on the president for saying that."

Watch more from Chaffetz above.

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