Mulroney may be good at currying favour with Trump but maybe that is not in our interests.

Trump has an agenda in mind for America but not for Canada unless it involves our annexation both economically or politically. Right now we only matter to them because of our resources, particularly oil. We are the largest foreign supplier of oil to the US. 

Trump will reopen NAFTA because he has reneged on too many other promises. It will be an easy matter for him to lean on Mexico and Canada to get a deal he can tout as a win. Mulroney cannot prevent this from happening.

In the end Canada must stand up to Trump or be overwhelmed. Better a Trudeau than a Mulroney to do the job.