Hungary is expected on Tuesday to agree a $500-million oil supply deal with the United States during the visit of U.S. Vice President JD Vance in Budapest, a source with knowledge of the plan told Bloomberg. Vance arrived in Hungary’s capital city earlier on Tuesday, just days ahead of the general election in the country on April 12, in which Hungarian Prime Minister Viktor Orban is badly trailing in poll numbers. The expected Hungary-U.S. deal would envisage Hungarian energy company MOL agreeing to buy about 500,000 tons of U.S. oil for…