What if Netanyahu actually succeeds in sinking the Iran nuclear deal?

Israeli Prime Minister Benjamin Netanyahu apparently believes a prospective deal with Iran over its nuclear program is so egregious that destroying it is worth swinging a wrecking ball at U.S.-Israeli relations. That view isn't very popular with Jewish Democrats or Israeli hawks, but he is Israel's prime minister and his critics aren't.

So, Netanyahu arrived in Washington late Sunday, and will give an address to the influential American Israel Public Affairs Committee (AIPAC) on Monday and, more consequently, a joint session of Congress on Tuesday. His goal, according to his own account and the White House's, is to kill the nuclear deal President Obama's administration and four other nations are negotiating with Iran. (In Israel, the speech is widely seen as driven by electoral politics, ahead of the country's tight March 17 election).

What if he succeeds?

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There are a few things to watch if Netanyahu's speech to Congress is seen as significantly responsible for the collapse of the Iran talks. The first is what happens to America's traditionally robust support for and defense of Israel. Netanyahu may or may not be prime minister in a few weeks — his Likud Party is neck-and-neck with the Zionist Camp party — but Obama will be president for two more years.

Susan Rice, Obama's national security adviser, vetoed several fairly anodyne resolutions criticizing Israel when she was America's ambassador to the United Nations, Jonathan Alter notes at The Daily Beast. Now she's warning that Netanyahu is being "destructive" to the U.S.-Israel relationship. "Soon enough, the U.S might decline to exercise its veto and chart a new, more balanced foreign policy in the Mideast, as it has recently in Cuba," Alter speculates. "With Obama safely re-elected and less concerned about the reaction, there's little that AIPAC or [billionaire U.S. Netanyahu-backer Sheldon] Adelson or Netanyahu could do about it."

Plenty of Israeli commentators and former military and intelligence officials are voicing grave concern that Netanyahu is turning Israel into a partisan issue, spoiling a long tradition of bipartisan support. "The most important strategic asset for Israel is the special relationship with the United States — Full Stop," former Israeli peace negotiator Gilead Sher tells Alter. "Intentionally ruining our relationship with our best ally in the world and most significant ally on this issue [Iran] is so counterproductive."

That's mostly political. What about the practical aspect?

Crucial details about the pending Iran agreement have yet to be ironed out or publicized. But "the deal that seems to be taking shape right now does not fill me — or many others who support a diplomatic solution to this crisis — with confidence,"says Jeffrey Goldberg at The Atlantic. Still, he adds, what's the alternative? "Netanyahu has no actual ideas — other than strategies that lead to endless sanctions of diminishing effectiveness and bombing runs of similarly dubious long-term effectiveness."

Martin Indyk, a former U.S. ambassador to Israel and Obama's onetime Israel-Palestinian negotiator, tackled a scenario where Obama reaches a nuclear agreement with Iran and Netanyahu "succeeds in killing the deal," telling Goldberg:

In a rosier scenario for Netanyahu, Obama is thwarted and... something happens. Maybe a new anti-Iran coalition forms in the Middle East, where deep-pocketed Sunni Arab states put aside their (at least rhetorical) concern for the Palestinians to focus on a mutual enemy with Israel. Or perhaps some cyber-espionage tool will succeed in crippling Iran's nuclear program. It could turn out that Iran is not actually interested in developing nuclear weapons, as it insists.

All those scenarios are possible — and unlikely. Netanyahu seems to have already hurt his chances to influence the current deal being negotiated in Switzerland. If he has a brilliant alternative plan, maybe he will share it with Congress and the world on Tuesday. If not, the large number of people who want to maintain the status quo — Israel the only nuclear-armed country in the Middle East — should wonder if they want Israel's prime minister to succeed in Washington.