BRUSSELS: EU leaders were hoping Monday to persuade Prime Minister Viktor Orban to back a watered-down oil embargo against Russia after a month of haggling over a blocked sanctions package. But the Hungarian leader, who has demanded an exemption from the ban and guarantees for his country’s energy supply, warned on arrival at the EU summit that no compromise had yet been reached. Orban confirmed that the proposal on the table would see Russian oil arriving in the EU and in Hungary by pipeline, rather than by sea, exempted from the sanctions. “For Hungary this is a good solution, it means that …