Italy’s Deputy Prime Minister Luigi Di Maio on Monday threatened to veto the European Union’s seven-year budget plan should the bloc not do more to share the burden of migrant arrivals. “In Europe, the music will change,” Di Maio wrote on Facebook less than two days after the country’s latest clash with Brussels over who should take in migrants rescued at sea. […] Di Maio last week threatened to withhold Italy’s EU contributions if the bloc did not agree to take in rescued migrants that the government had blocked on a ship in the port of Catania, in Sicily. …