Prime Minister Mark Carney said the counter-tariffs would kick in on Sept. OTTAWA — The federal government is set to unveil details of its retaliatory tariffs against the United States on Tuesday. Key points and original sources are listed below.

• Prime Minister Mark Carney said the counter-tariffs would kick in on Sept. 8.S1

• OTTAWA — The federal government is set to unveil details of its retaliatory tariffs against the United States on Tuesday.S2