brussels collapse talk new german government mean euro zone ambitious plan deep economic integration could put hold euro zone officials say tuesday german government coalition talk collapse sunday night liberal fdp party pull weeks exploratory talk plunge euro zone important economy political uncertainty raise prospect new elections euro zone leaders set direction deep euro zone economic integration summit middle december germany input crucial long germany clear position default agree anything therefore delay likely option one senior euro zone official involve euro zone integration talk say summit launch six months work would lead decisions june 2018 whether single currency area budget finance minister euro zone assembly european parliament deep integration push champion french president emmanuel macron also include transformation euro zone bailout fund european monetary fund creation sovereign insolvency mechanism things go hold formal act german government second euro zone official say stage see step leaders could take december june deepen euro zone integration german government without mandate say officials say potential delay euro zone integration talk big issue concern future architecture economic monetary union emu encompass 19 countries nothing make new decisions emu especially urgent believe real problem third senior euro zone official say june deadline always move need official say others note initial time talk make use window opportunity 2018 major euro zone countries except italy eu institutions face elections therefore free focus euro zone reform talk delay decisions key issue often sensitive politically could push back toward 2019 year elections european parliament formation new european commission choose new head european central bank chairman eu leaders official involve preparations december summit say would go ahead plan national elections happen time europe reason stop work official say others say expect mandate leaders would give commission work euro zone integration would probably weak would otherwise german government place lack german government put euro zone integration plan hold