washington congress face possible fight future iran nuclear agreement senior senate democrats demand wednesday trump administration provide lawmakers information show tehran comply international pact letter secretary state rex tillerson defense secretary jim mattis cabinet officials first report reuters lawmakers say administration provide information require 2015 iran nuclear review act republican president donald trump long criticize nuclear agreement one signature foreign policy achievements democratic predecessor barack obama speech unite nations tuesday trump blast deal reach unite state five world power iran know jcpoa call embarrassment unite state trump face mid-october deadline certify whether iran still comply jcpoa iran agree curb nuclear program exchange sanction relief wednesday senior u.s. official say trump lean toward certify iran comply pact let congress effectively decide whether kill agreement 2015 iran nuclear review act give congress right vote whether reimpose sanction suspend jcpoa president decide decertify law also require however president formally notify congress evidence justify decision wednesday letter sign democrats even trump fellow republicans question wisdom break agreement unless trump provide concrete evidence iran comply congressional aid party also say leave agreement seem unnecessary especially washington need work international partner complicate issue like north korea nuclear weapons ballistic missiles program civil war syria refugee crisis ed royce republican chairman house representatives foreign affairs committee say cnn trump u.n. speech unite state stay iran deal enforce hell democrats letter wednesday note 2015 review act require president provide information congress iranian breach agreement compliance concern within 10 days receive information date senate receive notification administration provide little public testimony congress status iranian compliance agreement letter say letter ask administration provide write report appropriate public testimony senate committees oct. aware information suggest iran comply would lead trump conclude continue suspension sanction u.s. national security interest letter tillerson mattis treasury secretary steve mnuchin energy secretary rick perry director national intelligence dan coat sign senators sherrod brown maria cantwell ben cardin richard durbin patrick leahy jack reed mark warner democrats congress brace new iran nuclear fight