washington u.s. senators call congress tuesday take back authority determine whether country go war say recent u.s. strike syria cover exist authorizations use military force senate foreign relations committee begin consider legislation would cover military action syria afghanistan iraq somalia libya yemen islamic state al qaeda islamist militant group always believe important congress exercise constitutional role authorize use force committee chairman republican senator bob corker tell hear tuesday president donald trump order stepped-up military activity syria afghanistan elsewhere members congress also want trump present strategy defeat islamic state militant group difficult us carry responsibility unless know commander chief need senator ben cardin committee top democrat say trump administration like former president barack obama use 2001 authorization use military force aumf al qaeda pass sept. 11 attack legal basis wide range military action since although bipartisan support congress debate vote new aumf introduce republican senator jeff flake democratic senator tim kaine measure face stiff opposition lawmakers introduce war authorizations repeatedly past several years fail advance amid sharp divisions congress whether limit commanders use military resources many war-weary members congress also want vote anything might become foreign military quagmire consume taxpayer dollars lead widespread u.s. casualties trump order stepped-up military operations islamic state delegate authority general u.s.-led force say tuesday shoot arm pro-syrian regime drone near border iraq syria u.s. warplane shoot syrian army jet syria sunday democratic senator tom udall vote 2001 authorization member house representatives would never imagine vote support u.s. troop syria 2017 engagements assad regime say senators want congress ok military action syria