washington former white house national security adviser michael flynn decline monday comply subpoena senate intelligence committee investigate possible russian interference 2016 u.s. election flynn invoke fifth amendment constitutional protection self-incrimination accord letter senate committee attorney see reuters flynn attorneys respond multiple request comment retire lieutenant general key witness russia probe roil first months president donald trump presidency spate negative news report senators richard burr mark warner top republican democrat intelligence panel say statement disappoint flynn decision would vigorously pursue testimony document relate investigation committee conduct one main congressional probe u.s. intelligence agency report russian meddle election whether collusion trump campaign russia moscow repeatedly deny allegations trump deny collusion separately monday washington post report trump ask two country top intelligence officials director national intelligence dan coat national security agency director admiral michael rogers help deny collusion team russia presidential campaign coat rogers decline request post report flynn apparently mislead pentagon investigators foreign connections seek renew security clearance early 2016 accord document obtain congressional democrats release part monday interview part clearance renewal process flynn say foreign trip private citizen fund u.s. company accord excerpt march 14 2016 report compile security clearance investigators fact trip flynn make moscow december 2015 attend gala dinner sit next russian president vladimir putin pay russia today u.s. officials consider state-run propaganda arm accord document previously release house oversight committee document late shed light flynn receive clearance hire trump national security advisor force resign february less month fail disclose content talk sergei kislyak russia ambassador unite state mislead vice president mike pence conversations excerpt release representative elijah cummings rank democrat house committee flynn decision decline comply senate intelligence committee subpoena first report associate press attorney write committee context committee call general flynn testimonial production document make clear reasonable apprehension testimony provide could use him flynn legal team say reject subpoena committee spurn offer make retire army general may letter give full account facts answer committee question circumstances permit include assurances unfair prosecution state absent assurances general flynn would respectfully decline request interview production document clear committee would flynn decide comply burr warren elaborate several panel members say wait learn come conclusion might come next see future bring democratic senator dianne feinstein tell reporters add may portend flynn face something serious senator jam lankford republican panel member say flynn within right invoke fifth amendment u.s. constitution get truth one way another lankford say twitter need facts speculation anonymous source congressional research service report outline three main options congress decide enforce subpoena seek criminal prosecution executive branch ask court civil judgment use dormant power inherent contempt detain imprison individual latter option use 75 years congress often rely criminal contempt statute recently reuters report thursday flynn advisers trump campaign contact russian officials others kremlin tie least 18 call email last seven months u.s. presidential race two former trump associate one-time campaign chairman paul manafort republican operative roger stone turn document senate panel request third campaign adviser carter page yet comply nbc news report cite congressional source flynn acknowledge pay consultant turkish government campaign flynn decline senate subpoena russia probe