EU leaders fail to agree on a 50 billion aid package for Ukraine and on renegotiation of EU budget

EU leaders fail to agree on €50 billion aid package for Ukraine and renegotiation of EU budget; financial package could not be endorsed by all 27 leaders, who earlier agreed to open membership negotiations with Ukraine; Ukrainian President Zelenskyy welcomes the agreement as 'a victory for Ukraine'; Hungarian Prime Minister Orban opposes the decision but decides not to use veto power; EU leaders also decide to open membership negotiations with Moldova; EU's credibility at stake