Top trade officials from the United States, Mexico and Canada are kicking off two days of talks on Monday on one of former President Donald Trump’s biggest achievements: the nearly one-year-old U.S.-Mexico-Canada Agreement. …Tai must also contend with antidumping and anti-subsidy duties that the Trump administration imposed on Canadian softwood lumber. …In recent months, numerous lawmakers have called for a new agreement to remove those duties because of a steep run-up in lumber prices that have increased the cost of homebuilding and other construction. Tai told lawmakers she was willing to look at negotiating a new agreement that hopefully would put the decades-old lumber frictions to rest.