washington congressional leaders quietly work bipartisan deal raise u.s. debt ceiling within weeks hop prevent difficult debt issue snarl budget fight come september senior democratic budget writer say friday john yarmuth top democrat u.s. house representatives budget committee tell reuters bipartisan interest raise debt limit august talk go leadership conversation say yarmuth add house democrats plan demand concessions republicans exchange support debt limit increase unlike countries u.s. government statutory limit much money borrow cover budget deficit result washington spend collect tax congress raise limit trump administration warn debt limit need raise fall treasury secretary steven mnuchin last month move target deadline action september october say tax receipt come slow expect senate republicans remain contact administration issue update plan senior aide say house democratic leader nancy pelosi say democrats support clean debt-limit bill free condition conservative republicans house freedom caucus traditionally vote clean increase already indicate would like raise debt limit less request trump administration congress agenda crowd healthcare legislation pending deal need late september fund government raise debt limit add another obligation past decade raise limit go routine job politically charge negotiation 2011 former democratic president barack obama republicans begin demand concessions exchange vote raise limit result nation twice go brink bust debt ceiling agreement could reach yarmuth say democrats oppose attach debt ceiling increase bipartisan legislation warn add poison pills think side want play game say bipartisan discussions senate debt limit begin leadership aide confirm senate democratic leader chuck schumer tell reporters early week responsibility raise limit lie republicans warn tie debt limit deficit-creating tax cut rich debt limit loom house leaders eye bipartisan deal