American duties on Chinese exports may be extended to cover all imports. An announcement could arrive in early December should President Donald Trump’s forthcoming summit meeting with President Xi Jinping not yield the “great deal with China” that President Trump wants. Tariffs already in place on $250 billion of exports don’t appear to have cut the U.S. trade deficit (which rose 10.5% in August on a year earlier) or seaborne imports from China (up 5.5% in September). The 60 day consultation period on the duties would result in their implementation coinciding with the seasonal lull in...