`` We do n't look at it as a linked situation , '' she said . Sources say U.S. noted Iran , Iran both interested in defeating ISIS . Obama is deep into talks with U.S. about its nuclear capabilities . Sources say that 's the main block to the countries cooperating on ISIS .
Sources say U.S. noted Iran , Iran both interested in defeating ISIS . Obama is deep into talks with U.S. about its nuclear capabilities . Sources say that 's the main block to the countries cooperating on ISIS .