Washington (CNN) -- Amid criticism from his Republican opponent that his foreign policy "projects weakness," President Barack Obama confronted Iran and Syria on Tuesday and warned those who killed an American diplomat in Libya that they would be held accountable. "The attacks on our civilians in Benghazi were attacks on America," Obama told the United Nations General Assembly. "There should be no doubt that we will be relentless in tracking down the killers and bringing them to justice." Both GOP presidential candidate Mitt Romney and running mate Rep. Paul Ryan of Wisconsin have in recent days challenged Obama's foreign policy record, which is perceived to be a strength for the incumbent.
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NEW: Romney and Ryan campaign in Ohio on education and jobs
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Obama: "The attacks on our civilians in Benghazi were attacks on America"
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Obama: U.S. could survive Romney presidency, but wouldn't thrive
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Barack, Michelle Obama on 'The View": "Talk the big stuff but don't sweat the small stuff"
"We can survive a lot," @placeholder answered, saying he thought Romney was a good man and means well.
Fresh polls give @placeholder the advantage in four crucial battlegrounds