sydney australian prime minister malcolm turnbull saturday appoint foreign minister act prime minister try stem fallout citizenship crisis cost government parliamentary majority turnbull delay monday long-planned trip israel hold emergency cabinet meet shore support australia high court rule friday deputy barnaby joyce four lawmakers expel parliament hold dual nationality court shock decision immediate ramifications strip coalition government one-seat majority hold low house force call by-election joyce seat send australian dollar low opposition labor party say consider legal challenge every decision make joyce since last year election turnbull say saturday deputy position would remain vacant dec. by-election joyce seat position normally go member national party junior partner coalition government foreign minister julie bishop member turnbull liberal party would instead act prime minister travel israel monday three days behind schedule government go good government go turnbull tell reporters sydney dismiss suggestions inability agree deputy indicate tensions within coalition time get tough put arm around mat turnbull need support one three independent lawmakers keep minority government afloat two sit weeks parliament leave recess year least two independent lawmakers promise initial support note may conditional turnbull particular pressure refuse demand opposition remove joyce renounce new zealand citizenship cabinet court decide fate turnbull say court interpretation constitution bar dual citizens parliament bid prevent split allegiances strict hard add consider whether recommend change constitution note half country population 24 million either bear overseas parent bear overseas objective ensure parliament open everybody say referendum would need change constitution high court rule seven lawmakers already resign seven accept dual nationals time election claim unaware status confer second nationality birth others descent others dismiss senators upper house seat assign party-appointed alternatives australian pm put foreign minister charge amid government crisis