FACTBOX-Energy ties between Venezuela and United States

the Chavez government in 2007 hit U.S. majors working in Venezuela hard. Both Exxon Mobil Corp and ConocoPhillips (COP.N * Supplies of Venezuelan crude to the Chalmette refinery, part-owned by Exxon, and ConocoPhillips' Sweeny refinery -- both U.S.-based...