The U.S will hold China to the “complete enforcement and complete implementation” of the U.S.-China Phase One Agreement, including its now-expired purchase commitments, urging the country to make up a “deficit” and take other steps before any discussions about a possible extension of the deal, Agriculture Secretary Tom Vilsack said on Monday. “Here’s the deal: Our Chinese friends were about $16 billion light over what they committed to purchase. And that’s why [U.S. Trade Representative Katherine Tai] … is going...