Hillary Clinton also weighed in on the controversy surrounding a Republican letter to Iran aiming to undermine the ongoing nuclear talks. An open letter from 47 Republican senators warned the Iranian government the deal could be nixed by a Republican Congress or future Republican president.

Hillary Clinton: “The recent letter from Republican senators was out of step with the best traditions of American leadership. And one has to ask: What was the purpose of this letter? There appear to be two logical answers. Either these senators were trying to be helpful to the Iranians or harmful to the commander-in-chief in the midst of high-stakes international diplomacy. Either answer does discredit to the letters’ signatories.”

According to the website Lobe Log, the senator who spearheaded the letter, freshman Arkansas Republican Sen. Tom Cotton, received nearly $1 million in donations to his election campaign efforts last year from the Emergency Committee for Israel, run by neoconservative pundit Bill Kristol. The Intercept reports Cotton was set to appear at a secretive meeting of weapons contractors one day after sending the letter on Monday.