Mitt Romney's presidential campaign spiked an ad during the final weeks of the 2012 campaign that would have criticized President Obama's handling of the terrorist attack in Benghazi, a source with knowledge of the ad confirmed to The Hill.

The television spot was created by the Republican National Committee and played off the famous "3 a.m." attack ad that Hillary ClintonHillary Diane Rodham Clinton2016 pollsters erred by not weighing education on state level, says political analyst Could President Trump's talk of a 'red wave' cause his supporters to stay home in midterms? Dem group targets Trump in M voter registration campaign: report MORE aired against Obama during the 2008 campaign.

"It's 3 a.m. and your children are safe and asleep, but there's a phone in the White House and it's ringing. Something's happening in the world," a voiceover in the ad says as images of a building burning are shown and gunfire is heard in the background. The ad then displays text that reads: "Security requests denied. Four Americans dead. And an administration whose story is still changing."

"The call came. Americans deserve answers," the final text of the ad reads.

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According to the source with knowledge of the ad's creation, the Romney campaign stopped it from airing for fear that it would shift the focus away from the economy.

ABC News first reported the existence of the ad on Thursday.

Republicans have repeatedly criticized Obama and other top administration officials for their handling of the Sept. 11 attack on the Benghazi consulate, which left four people dead, including the U.S. ambassador to Libya.

A number of Republican-controlled congressional committees have investigated the attack and lawmakers are urging Speaker John BoehnerJohn Andrew BoehnerDemocrats should be careful what they wish for Blue wave poses governing risks for Dems Nancy Pelosi: Will she remain the ‘Face of the Franchise’? MORE (R-Ohio) to create a select committee to investigate it.