President Barack Obama has sharply challenged Mitt Romney on foreign policy in their final campaign debate Monday night in Boca Raton, Fla.

Romney went on the offensive, too. When Obama said the U.S. and its allies have imposed crippling sanctions on Iran to halt nuclear weapons development, the Republican challenger responded that the U.S. should have done more. He said repeatedly, "We're four years closer to a nuclear Iran."

Romney also said the U.S. Navy has fewer ships than it did in 1916. Obama responded that there also are "fewer horses and bayonets" and that the Navy now has "things called aircraft carriers where planes land on them."

The two men found accord on more than one occasion when it came to foreign policy.  Romney applauded the killing of Osama bin Laden. Each stressed unequivocal support for Israel when asked about a U.S. response if the Jewish state were attacked by Iran. Both also said they oppose direct U.S. military involvement in the efforts to topple Syrian President Bashir Assad.

And while the focus of the final faceoff was to have been primarily on foreign policy, both candidates took the liberty of shifting questions to talk about domestic policy.

Debate Fact Check

President Obama claimed U.S. exports to China have doubled since he took office but the Washington Post reports exports to China have gone from $89 billion dollars in 2008 to $103 billion last year.

On Iran Mitt Romney said, "I would say that ships that carry Iranian oil can't come into our ports". But no Iranian oil has come to the U.S. for some time according to the Washington Post.

President Reagan banned all imports in 1987 and president Clinton banned all american participation in iranian petroleum development in 19-95.

Few seemed swayed by final presidential debate

Monday night's foreign policy debate may have swayed some undecided voters -- but those who turned out at debate-watching events around the country generally seemed to have their minds made up ahead of time.

At a viewing party at Tulane University's Political Science Department, junior Brian Bickers said the debate would "almost certainly" not change his support for President Barack Obama. But he still put off mailing his absentee ballot until afterward.

Attorney Mark Frank, watching at Pittsburgh's Jewish Community Center with about 50 other people, said he was glad to see a more assertive Obama at the debate -- and he especially enjoyed the moment when Obama responded to Mitt Romney's criticism that the Navy has fewer ships than it used to have by saying that there are also fewer horses and bayonets.

At the debate site in Boca Raton, Fla., hundreds of students gathered on a soccer field to watch the face-off on inflatable screens. Accountant William Lopez, who watched the debate there with friends who attend Lynn University, said Romney impressed him with his promise of creating millions of jobs. Lopez, who voted for Obama in 2008, said Obama hasn't provided any details on "what he's going to give us" in a second term.

Obama, Romney pumped for dash to the finish

President Barack Obama and Republican Mitt Romney are opening a two-week sprint to Election Day powered by adrenaline, a boatload of campaign cash and a determination to reach Nov. 6 with no would-have, should-have regrets.

The candidates will vastly accelerate their travel, ad spending and grass-roots mobilizing in a race that's likely to cost upward of $2 billion by the time it all ends.

All the focus now is on locking down support in the nine states whose electoral votes are still considered up for grabs. Obama campaigns Tuesday in Florida and Ohio while Romney heads west to Nevada and Colorado.