Plan B was always to seek markets in Europe, Asia, & Latin America to replace or augment those we've customarily enjoyed with the US. In fact, we've always planned to establish & deepen those other trade links regardless of whether the renegotiation of NAFTA proceeded satisfactorily or not. 

Since Trump became President, the best way to build these alternative trade links has been to bargain in good faith but without unreciprocated concessions on the NAFTA front; thus giving ourselves (while not yet in a US trade war) time to build these alternatives & allowing other countries to clearly seek (a) that the US is increasingly an unreliable trading partner, & (b) that Canada is a reliable North American alternative.

To date, we've substantially achieved CETA with the EU, are moving ahead with a Pacific rim minus the US TPP negotiation, will continue NAFTA with Mexico & add to our Latin America bilateral deals & seek deals with China & India.