U.S. Trade Representative Robert Lighthizer and Treasury Secretary Steven Mnuchin are expected to speak with Chinese Vice Premier Liu He this week as the two sides push to firm up a “phase one” trade agreement. The clock on the U.S.-Mexico-Canada Agreement, meanwhile, continues to tick -- and the Global Forum on Steel Excess Capacity will hold what could be its final ministerial. The principal-level call between U.S. and Chinese officials will follow a discussion among deputies last week. The goal...