TSX futures are pointing lower after former President Donald Trump threatened new tariffs on Greenland. The potential trade measures create fresh uncertainty for Canadian markets, which are sensitive to U.S. policy shifts. Investors are reacting to the possibility of broader trade disruptions.

Canada's resource-heavy TSX often moves in sync with U.S. sentiment. A trade spat involving Greenland, a Danish territory with untapped mineral wealth, could complicate supply chains for North American mining and energy firms. The threat reignites fears of protectionist policies that could hurt cross-border commerce.

Traders will watch for any formal policy announcements from Washington. The market's reaction underscores how political rhetoric can quickly sway commodity-linked equities. For now, the TSX faces headwinds as investors price in potential tariff risks and their impact on corporate earnings.