The relationship between President Obama and Israeli Prime Minister Benjamin Netanyahu has always been an uneasy one, which has been exacerbated by the pressures that the Israeli leader is putting on the president less than two months before the U.S. general election regarding the looming threat of Iran having nuclear weapons.

Last week Netanyahu lashed out with his frustrations with the Obama administration, saying, "those in the international community who refuse to put red lines before Iran don't have a moral right to place a red light before Israel."

So where is that red line? Netanyahu discussed that on Sunday morning on NBC's Meet The Press.

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"I just think it's important to communicate to Iran that there's a line that they won't cross," Netanyahu said. A red line in this case works to reduce the chances of the need for military action because once the Iranians understand that there's a line that they can't cross, they're not likely to cross it."