(CNN) - Not long after taking a few seconds of silence for those affected by Superstorm Sandy, Rudy Giuliani began ripping into President Barack Obama on Friday while speaking at major campaign event for Mitt Romney and Paul Ryan in Ohio.
The former New York City mayor delivered a series of blistering zingers against the president, rallying the massive crowd with line after line of reasons why Obama should "resign" and faulting him for "incompetence" over the Libya consulate attacks.
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With new numbers showing the unemployment rate had ticked up to 7.9%, Giuliani said the Obama administration should be "ashamed of themselves" for framing the figure as a positive sign. Giuliani, however, did not mention that 171,000 jobs were added last month–more than economists were expecting.
"He should resign! He told us he would resign if he did this poorly," Giuliani said, referring to a 2009 interview in which Obama vowed to turn the economy around in three years, otherwise there would be a "one-term proposition."
Giuliani continued to fire off: "He lied. He has been a disaster. The worst president for our economy in our lifetime. He doesn't want a second term. He wants a second chance, because he screwed it up the first time."
The former mayor, who also ran for president in 2008, pivoted to Romney's business experience, saying it should be considered a strength and blasted Democrats for making it a target on the campaign trail.
"They tried to humiliate him because of that. You know something, if Governor Romney can have the success for America that he had for Bain Capital, Thank God! Our people would be working again," Giuliani said, referencing Romney's former private equity firm.
Giuliani received perhaps his biggest applause of the night when he focused on the Benghazi consulate attacks, which killed four Americans, including the U.S. ambassador to Libya, in September. The administration is now investigating why the diplomatic post was not robustly staffed prior to and during the attacks.
The former mayor, a top surrogate for Romney's campaign, argued the violence would not have happened if Sen. John McCain had won the presidential election in 2008.
"Maybe if we had a president who was paying attention, we wouldn't be going through all this investigation of what's being covered up about Libya," he said.
He told the audience they have a chance to "right that wrong" by removing the president from office.
"You know that what happened in Libya is the result, at least, of incompetence," he said.
Giuliani placed the responsibility squarely on the Ohio audience to make the change in the Oval Office.
"You know what stands in his way? You know what's going to stop him? Ohio! You're going to do it," he said.