Santorum's comments came as Obama met at the White House with Israeli Prime Minister Benjamin Netanyahu to discuss, according to the White House, the "unbreakable bond between the United States and Israel." 

Tensions have flared between the two countries over Iran and its nuclear program. Netanyahu's government says time is running out for a military strike against Iran that would prevent the country from developing nuclear weapons, but the United States is preaching patience after imposing a new round of economic sanctions. 

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During a speech Sunday at the American Israel Public Affairs Committee, Obama stressed his commitment to Israel's security.

"I have Israel's back," Obama said in his speech.

Santorum has regularly criticized Obama on Israel, charging that the president is not doing enough to deter Iran from acquiring a nuclear weapon. Santorum has said that, if elected president, he would attack Iran's nuclear facilities if it did not stop production.