Iran’s Supreme Leader Ayatollah Ali Khamenei has express support for a vote in Iran’s parliament on the nuclear deal Iran agreed to with six world powers. The Iranian leader said he would leave it to lawmakers to decide whether to approve or reject the deal.

The U.S. Congress is preparing to debate the deal by the middle of September. Thirty-four senators have expressed support for the deal. Critics say it does not do enough to prevent Iran from developing a nuclear weapon.