WASHINGTON — The Canadian government told the Trump administration new legislation combating forced labour in supply chains should shield Canada from new tariffs. In a written submission the Government of Canada said it “remains committed to working closely with the US to eradicate forced labour from global supply chains.” …Ottawa’s case was among more than 1,500 written submissions ahead of a hearing in Washington this week on the use of Section 301 of the Trade Act of 1974 to rebuild his global tariff wall. US Trade Representative Jamieson Greer launched a trade investigations into 60 countries, including Canada. Greer said Canada, Mexico, the UK and some other countries should be hit with 10% duties because they are not doing enough to enforce bans on forced labour. …Canada already had legislation intended to curb forced labour in supply chains. But the federal government tabled a bill last month to boost enforcement.