Investors' tariff jitters have returned to the forefront this week, as President Trump hinted at more fronts in his trade war while companies flag the emerging effects of the duties to their bottom line.

When Canadian Prime Minister Mark Carney meets with President Donald Trump on Tuesday, their discussions are expected to include tariffs, economic issues, and national security.“We’ll focus on addressing immediate trade pressures—and the future economic and security relationship between our two sovereign nations,

The meeting came as the United States’ neighbor to the north deals with Trump’s tariffs and threats to annex the country.