Trump earlier said Canada and Mexico tariffs would go into effect tomorrow. Later in the press conference he was asked if there was any room for negotiation before the tariffs went on and he said there wasn't.

USD/CAD has jumped to 1.4520, about 90 pips.

USDCAD 10 mins
USD/CAD 10 mins

The broader market is also rolling over after he said there was no room left for negotiations.

We will see.

Source: Forex Live