Ukraine Monday warned its European ambitions are at risk as EU leaders struggle to agree on renewing financial support for Kyiv and extending an invitation to start formal membership talks. Leaders of the 27 European Union members meet Thursday to decide the fate of a promised 50 billion-euro ($54 billion) aid package, additional funds for weapons shipments, and opening Ukraine's path to join the bloc. But key EU issues require unanimity, and Hungary's Prime Minister Viktor Orban has threatened to block any new support for Ukraine, 21 months after the Russian invasion.