Sen. Marco Rubio dismissed President Obama’s agreement to limit Iran’s drive for a nuclear bomb as failed diplomacy.

The Florida Republican, who is expected to announce his presidential bid on April 13, said the framework of an accord between Tehran and the United States and other world powers isn’t strict enough to ensure Iran can’t develop nuclear weapons. Rubio essentially said that Obama got played by the Ayatollahs. The senator, who serves on the Foreign Relations Committee, has previously said he would be willing to cancel any agreement with Iran that he believes does not accomplish its core objectives.