The Globe and Mail reports in its Monday edition that Prime Minister Mark Carney has signalled his willingness to help businesses endure a prolonged trade war with the United States after walking away from talks with the Trump administration on Friday. The Globe's Matthew Scace writes that the PM said: "We will support these businesses for as long as it takes. ... In other words, beyond the life of this U.S. administration." He said Ottawa will provide details on tariff relief for businesses this week, primarily through the Business Development Bank of Canada. On Monday, the PM is scheduled to announce "investments to defend our waters and strengthen our trade routes," at a news conference with Premier Christine Frechette. Mr. Carney has promised dollar-for-dollar tariffs on American imports beginning after Labour Day. University of Calgary economics professor Trevor Tombe estimates those tariffs would generate about $1-billion in additional monthly tax revenue for Ottawa. He said, "That's a lot that they then can use to support individuals and businesses through this moment." Ontario Premier Doug Ford said, without giving details, that the trade war "will be painful" and Ottawa will back the steel and auto sectors.