President Donald Trump told Hungarian Prime Minister Viktor Orbán on Friday that the U.S. is “looking at” exempting Hungary from sanctions targeting Russian oil a move that chips away at one of the few symbolic levers the U.S. still maintains over Russia’s energy exports while signaling flexibility toward an ally that’s long played both sides of the energy chessboard. The exemption talk comes just as Ukraine’s President Volodymyr Zelenskyy vowed to halt Russian oil shipments to Hungary through the Druzhba pipeline,…