washington u.s. president donald trump grudgingly sign law new sanction russia wednesday move moscow say amount full-scale trade war end hop good tie trump administration congress overwhelmingly approve legislation last week pass measure conflict republican president desire improve relations moscow trump sign bill behind close doors without fanfare customarily accompany sign executive order criticize measure infringe power shape foreign policy say could make far good deal governments congress russian prime minister dmitry medvedev call sanction tantamount full-scale trade war add facebook post show trump administration demonstrate utter powerlessness hope relations new american administration would improve finish write trump litany concern sanction also affect iran north korea raise question vigorously trump implement regard russia favor tough measure punish deter aggressive destabilize behavior iran north korea russia legislation significantly flaw trump say message lawmakers know sign statement also issue statement press bill new law allow congress pass measure punish russia interference 2016 u.s. presidential election annexation ukraine crimea halt effort trump ease sanction russia hand tie republican-controlled congress approve legislation large margin last week presidential veto bill would override legislation provoke countermeasures russian president vladimir putin say sunday u.s. diplomatic mission russia must reduce staff 755 people russia also seize two properties near moscow use american diplomats trump repeatedly say want improve relations russia desire stymie u.s. intelligence agencies find russia interfere help republican democratic presidential candidate hillary clinton u.s. congressional panel special counsel investigate moscow deny meddle trump deny collusion campaign republican house representatives speaker paul ryan welcome sign say would send powerful message adversaries hold accountable statements sanction law trump complain say congressional infringement president constitutional power set foreign policy say law reflect congressional preferences rather legal mandate flag areas administration see wiggle room underenforce law cite claim constitutional concern say harold koh yale law school professor legal adviser state department obama administration house top democrat nancy pelosi say sign statement raise serious question whether administration intend follow law trump say elect partly successes business add president make far good deal foreign countries congress trump sign statement late series mix signal administration russia feel like several policies implement compatible one another one say olga oliker russia expert center strategic international study think tank base washington vice president mike pence tour baltic countries adjacent russia follow hawkish line pence say trump sign legislation would show congress president speak unify voice russia however secretary state rex tillerson like trump critical legislation action congress put sanction place way neither president happy tillerson say tuesday sanction affect range russian industries might hurt russia economy already weaken 2014 sanction impose annexation crimea besides anger moscow legislation upset european union say new sanction might affect energy security prompt retaliate need several provision law target russian energy sector new limit u.s. investment russian company american company also would bar participate energy exploration project russian firm stake 33 percent high legislation include sanction foreign company invest help russian energy exploration although president could waive sanction would give trump administration option impose sanction company help develop russian export pipelines nord stream pipeline carry natural gas europe german company involve trump sign russia sanction bill moscow call 'trade war