SEOUL, SOUTH KOREA — South Korea pledged on Monday a record amount of financing support for exporters to mitigate any negative impact from changes in U.S. trade policies as Donald Trump was poised to be sworn in for his second presidency. The government plans to provide 360 trillion won, or $247.74 billion, worth of policy financing to exporting companies through state-run banks and institutions this year, according to a statement released by the finance ministry. “There are concerns that external uncertainty will be heightened under the incoming U.S. administration and adversely affect exports,” the ministry said. The ministry said it