Iranian President Hassan Rouhani told CNN over the weekend that watching Republican candidates for president vow to nullify the Iran nuclear agreement if they win office was "laughable."The Iranian leader mocked the GOP presidential hopefuls, saying that some of them wouldn't be able to find Iran on a map while Iranians consider their rhetoric "a form of entertainment.""Sometimes when I would have time, some of [the GOP debate] was broadcast live and I would watch it - some of it was quite laughable," Rouhani told CNN. "It was very strange, the things that they spoke of.""Some of them wouldn't even know where Tehran was in relation to Iran. Some of them didn't know where Iran was geographically, not distinguishing that one is the capital of the other."