would be not hire jeff sessions. >> reporter: he is not prepared to lose in 2020. >> are you prepared to lose? >> no. probably not. probably not. i mean i -- it would be much better if i said yeah. it would be much easier to say, well yes. no, i'm probably not too prepared to lose. >> reporter: the president is about to embark on another foreign trip with the pattern of brinksmanship will be tested, he'll head to japan for a g-20 summit to meet with u.s. allies that are weary of his hanlling of iran and north korea. a critical national security challenge where his pattern of brinksmanship is not yet worked, wolf. >> jim acosta at the white house. live to tehran right now. our senior correspondent fred flight again is on the scene. what are the iranians saying in response to president >> reporter: hi, wolf, the iranians are laughing off