Confronting high-profile institutions like the Bank of China would be “a big damn deal,’’ said Richard Nephew, senior research scholar at Columbia University’s Center on Global Energy Policy and a former Obama sanctions official. “Those kinds of bigger sanctions are ones being avoided by this administration because they have bigger fish to fry.” The most dramatic step would be for the U.S. to punish companies for supplying oil to North Korea. China sends at least 1 million tons of crude to its reclusive neighbor every year, accounting for almost all its supply. A trade war between the US and China will be very harmful for both country. Relations will be very bad as well. People need to know this.