Senate Minority Leader Harry Reid will endorse the Iran nuclear deal, according to a statement the Nevada Democrat released Sunday.

“I strongly support this historic agreement and will do everything in my power to ensure that it stands,” Reid said in the statement.

He called stopping Iran from obtaining a nuclear weapon “one of the most important national security challenges of our generation.”

“This nuclear agreement is consistent with the greatest traditions of American leadership. I will do everything in my power to support this agreement and ensure that America holds up our end of the commitment we have made to our allies and the world to prevent a nuclear-armed Iran. I will vote no on the resolution of disapproval and urge my colleagues to do the same,” the statement continued.

The Nevada Democrat’s decision provides much needed support as President Obama tries to win approval for the plan.

“I’m going to do everything in my power to make sure the deal stands,” Reid told the Washington Post, which first published reports of Reid’s approval.