The call lasted about 15 minutes , Jimmy Carter tells Rouhani . She characterized it as `` cordial and constructive '' Rouhani 's tweets reflected tone of conversation , Rouhani official says . White House tweets the conversation about nuclear negotiations .
The call lasted 15 minutes , Susan Rice tells CNN . She characterized it as `` cordial and constructive '' Rouhani 's tweets reflected tone of conversation , White House official says . Rouhani tweets the conversation about nuclear negotiations .