“After working my way through the details and the alternatives, losing a lot of sleep, and having a lot of good conversations with so many people, I am convinced that moving forward with this deal is the best chance we have at a strong diplomatic solution,” Washington Senator Murray, the fourth-ranking Senate Democrat, said, Politico reported on Tuesday.

“It (JCPOA) puts us in a stronger position,” she added.

Murray is the 29th Senate Democrat to endorse the agreement. Just two Senate Democrats have said they will oppose the accord in Congress — Senator Chuck Schumer of New York and Sen. Robert Menendez of New Jersey.

Iran and the Group 5+1 (Russia, China, the US, Britain, France and Germany- also known as P5+1 or E3+3) finalized the text of lasting deal on Tehran’s nuclear program on July 14.

While the United Nations Security Council has adopted a resolution to endorse the deal, the text of the document needs to be reviewed by both Iran’s Parliament and the US Congress.

US President Barack Obama has promised a swift veto in the event of a Congressional rejection of the agreement in September. US lawmakers would then have to find enough votes to override the president.