Obama will sign Iran sanctions bill passed by Senate
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The Senate easily passed an extension of an Iran sanctions law on Thursday, sending the legislation to President Obama’s desk.

Senators voted 99-0 to approve a 10-year extension of the Iran Sanctions Act, which includes penalties against Iran’s banking, defense and energy sectors. The law was set to expire at the end of the year.

Sen. Bernie SandersBernie SandersWTO faces renewed scrutiny amid omicron threat Overnight Health Care — Presented by March of Dimes — Abortion access for 65M women at stake Hospitals in underserved communities face huge cuts in reckless 'Build Back Better' plan MORE (I-Vt.) didn't vote.

Obama is expected to sign the legislation, a White House official said Thursday, ending weeks of uncertainty about a possible veto. 

The official said the administration has determined the measure does not violate the Iran nuclear agreement, meeting a condition had Obama set to earn his signature. 

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Lawmakers argue the sanctions extension is needed as a failsafe in case Iran breaks its commitment under the landmark pact reached last year. 

Under the deal, Iran agreed to curtail its nuclear program in exchange for the United States and other countries lifting economic sanctions.

"The practical effect is the Iran nuclear agreement depends on our resolve, on our commitment to... stop a nuclear-armed Iran by using sanctions and other means if necessary," said Sen. Richard Blumenthal (D-Conn.), who supported the Iran deal.

Even though Obama will sign the measure into law, the White House said it views it as unnecessary, arguing the administration has broad latitude to punish Iran if it violates its commitments to the deal. 

Senate Republicans, including Foreign Relations Committee Chairman Bob CorkerRobert (Bob) Phillips CorkerCheney set to be face of anti-Trump GOP How leaving Afghanistan cancels our post-9/11 use of force The unflappable Liz Cheney: Why Trump Republicans have struggled to crush her  MORE (R-Tenn.), initially wanted to pass the extension as part of a broader bill that would also bolster sanctions against Iran for a string of ballistic missile tests.

But Democrats signaled early that they wouldn't support anything besides a "clean" extension of the law.

Senate Majority Leader Mitch McConnellAddison (Mitch) Mitchell McConnellLawmakers remember Bob Dole: 'Bona fide American hero' Senate leaders face pushback on tying debt fight to defense bill Former Sen. Bob Dole dies at 98 MORE (R-Ky.) indicated Thursday the extension would give President-Elect Donald TrumpDonald TrumpBiden heading to Kansas City to promote infrastructure package Trump calls Milley a 'f---ing idiot' over Afghanistan withdrawal First rally for far-right French candidate Zemmour prompts protests, violence MORE and a GOP-controlled Congress flexibility as they review Obama's Iran policies next year. 

“These authorities should remain in place as we address how best to deal with Iranian missile tests, support to Hezbollah and the Syrian regime," he said.

The extension easily passed the House last week in a 419-1 vote, but Obama had faced external pressure to reject the legislation.

Ayatollah Ali Khamenei, Iran's supreme leader, warned last week that extending the sanctions law would constitute a violation of the nuclear deal.

"The most recent of them is the 10-year extension of the sanctions. If these sanctions are extended, it will surely constitute a violation of the [Joint Comprehensive Plan of Action] and they should know that the Islamic Republic will definitely react to it,” he said. 

Jordan Fabian contributed. This story was updated at 3:07 p.m.