Oil prices slipped on Friday as concerns over the impact of a global trade war depressed sentiment, although impending U.S. sanctions on Iran and falling Venezuelan output limited losses. Benchmark Brent crude oil LCOc1 was down 40 cents a barrel at $77.37 by 0840 GMT. U.S. light crude CLc1 was 30 cents lower at $69.95. U.S. President Donald Trump threatened in an interview with Bloomberg News on Thursday to withdraw from the World Trade Organization, his latest salvo in a deepening dispute between the United States and its major trading partners. Such a move would undermine one of the foundations of the global trading system, which the United States was instrumental in creating. Economists are worried that rising trade barriers between […]