san juan/washington democratic u.s. senators draft letter republican senate majority leader mitch mcconnell insist legislation design solve puerto rico debt crisis include mechanism island restructure debt accord draft letter see reuters move challenge republicans push bill congress bring puerto rico finance federal oversight generally oppose let u.s. commonwealth restructure debt democrats argue oversight conditional allow puerto rico govern federal bankruptcy debt restructure laws congressional source familiar letter say senate democrats plan make public tuesday ahead hear puerto rico house committee natural resources time remain uncertain solution must allow puerto rico restructure meaningful portion debt accord draft letter note puerto rico include chapter u.s. bankruptcy code 1984 congress inexplicably exclude nationwide approach resolve municipal insolvency letter generally aim demonstrate party unity typically circulate collect many signatures possible show strength give issue congressional source say letter author expect signatures 44 democratic senators independent senators broad support achieve would allow democrats block legislation include restructure mechanism although guarantee republicans control congress would draft bill include one restructure option would coup island governor alejandro garcia padilla long say puerto rico need cut 70 billion debt grow economy stance face resistance creditors aside debt load puerto rico face widespread economic strain include 45-percent poverty rate shrink tax base grow number citizens jump mainland unite state island begin skip debt payments recent months order make others face lawsuits insurers bond letter come weeks house speaker paul ryan demand legislation end march address puerto rico debt urge match commitment act responsible solution end first quarter draft letter say address mcconnell democrats demand restructure mechanism puerto rico letter