By Fareed Zakaria
Saudi Arabia is not going to accept any deal on Iran's nuclear program, no matter what is in it. Saudi objections to the Islamic Republic of Iran are existential. The Saudis regard Tehran as a heretical, Shiite, Persian enemy that must be opposed. Its antipathy predates Iran's nuclear program and will persist whatever the resolution of it.
And then the Republicans in the U.S., some of whom have serious objections and others who see this as an easy avenue to outflank President Obama on the right, placing him in the familiar spot of a liberal Democrat who is soft on America's foes.
Many of us have assumed that the greatest obstacle to a deal would come from Tehran. Supreme Leader Ayatollah Ali Khamenei and the Revolutionary Guards remain deeply anti-American, and they may well oppose the concessions that President Rouhani and Foreign Minister Zarif would have to make to get a deal. But it’s now clear that greater obstacles might lie in the path of the negotiators on the other side. The minute any deal is announced, Saudi Arabia and Israel will denounce it, and many Republicans will join in. Given that Congress would have to pass laws to lift any of the major sanctions against Iran, this could prove to be an obstacle that cannot be overcome.
So Obama faces two major challenges. First he has to get a deal that the hard-liners in Tehran can live with. Then he has to get one that the hard-liners in Washington and Jerusalem and Riyadh can abide. If he can do both, maybe he will deserve his Nobel Peace Prize after all.
Watch the video for the full Take or read the TIME column