Mexican President Claudia Sheinbaum this week said Mexico was determined to “defend” the U.S.-Mexico-Canada Agreement after President Trump suggested the deal might no longer be needed. Similarly, Canada’s ambassador to the U.S. said on Thursday that Ottawa is not keen to give up the pact. Trump, during a press briefing in the Oval Office with Canadian Prime Minister Mark Carney earlier this week , described USMCA as a “transitional deal” and said he didn't know if “it's necessary anymore,” while...