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 Clinton 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.
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 Boehner (R-Ohio) to create a select committee to investigate it.