TORONTO — Canadian businesses hit by targeted U.S. tariffs are struggling to respond as the trade war drags into its second year. …industries like metal production, lumber and automobiles continue to face steep duties more than a year after U.S. President Donald Trump upended the global status quo. Companies have cut staff, pulled back on production and pushed for government action as the heavy duties continue to shake the crucial and long-standing trade relationship with the U.S. …“Because of the way that these tariffs are imposed … five to six key manufacturing subsectors are really, really hurting versus the rest of the economy”, said Claire Fan, senior economist at RBC. …The softwood lumber industry was hit by harsh duties back in 2017, which Trump has since added to, resulting in production down over 25 per cent since the first round, she noted. The result is 22 mills closed since 2022 and another 50 with reduced operations…