washington u.s. lawmakers say high-profile brief trump administration north korea wednesday fail provide firm strategy hop deal describe major national security threat standoff escalate reclusive asian nation development nuclear weapons long-range ballistic missiles president donald trump welcome 100 members senate highly unusual meet white house complex secretary state rex tillerson secretary defense jim mattis director national intelligence dan coat marine general joseph dunford chairman joint chiefs staff administration officials often travel capitol brief lawmakers national security issue time entire senate hop bus white house vice president mike pence four officials late brief house representatives classify meet take place secure auditorium capitol complex brief come trump try put best face first 100 days office sign executive order roll back democratic policies period define absence major legislative achievements democrats dismiss senate white house field trip little photo opportunity republicans little enthusiastic ok brief senator bob corker republican chairman senate foreign relations committee tell reporters arrive back senate certain would brief today say ask administration firm strategy senator john mccain chair arm service committee say develop one week trump discuss north korea u.n. ambassadors increase u.s. military presence region lean china pressure pyongyang tillerson chair u.n. security council meet friday discuss tough sanction brief members house express confidence administration officials speak say real concern representative brad sherman senior member house foreign affairs committee say convince administration would enough control pyongyang regard level resolve modest weak maybe even phony way put enough pressure north korea get china sherman tell reporters mac thornberry chairman house arm service committee say administration want use variety tactics push north korea give nuclear ambition say agree options must table incredible military presence region include missile defense especially regime say u.s. lawmakers say trump administration still lack clear north korea plan