is "more vicious and more aggressive" than its predecessor. [ speaking foreign language ] >> reporter: "trump is always using aggressive words," he says, singling out the president's tweets. "it is the u.s. that is threatening us." >> i've had meetings on north korea. he's acting very, very badly. i will tell you. he's acting very badly. >> reporter: president trump has often tweeted about the, quote, "menace of north korea." "north korea is looking for trouble," he wrote. "they have been playing the united states for years." he has promised to, quote, "solve the problem." yesterday, when the u.s. dropped the mother of all bombs on isis caves in afghanistan, the president was asked if it was a message to north korea as well. >> i don't know if this sends a message. it doesn't make any difference if it does or not. north korea is a problem. the problem will be taken care of. >> reporter: the u.s. now sending the aircraft carrier, the "uss vinson" into the region. american troops conducting military exercises on the