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 Rodham ClintonDNI official challenges reports of low morale in intelligence community Why the GOP cannot sweep its Milo scandal under the rug Dems worry too much about upsetting others. That needs to stop. 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 BoehnerHouse markup of ObamaCare repeal bill up in the air Conservatives to Congress: Get moving Boehner: ObamaCare repeal and replace 'not going to happen' MORE (R-Ohio) to create a select committee to investigate it.