EU leaders are set for a showdown with Hungary on Thursday as they meet for a specially convened summit to decide on the bloc’s economic aid for Ukraine. At stake is €50 billion ($54 billion) in financial aid for Ukraine over the next four years until 2027 – an aid package that Hungarian Prime Minister Viktor Orbán vetoed in December. The €50 billion sum is part of the EU’s overall budget review. Decisions on the bloc’s budget require unanimity from member states, meaning Hungary’s dissent has caused major friction with fellow EU countries. Orbán has linked the EU budget negotiations with the …