It remains to be seen what the outcome will become of all this; negative, neutral or positive. The danger is if the U.S. focus becomes extremely insular as this would disrupt the global economy. 

Best to ignore Trump's bluster it's just his modus operandi. I trust Canada's negotiators up for the task of renegotiation and they won't be swayed by Trump's exaggerated MO. If anything this will be a test of Trudeau and his leadership. Let the games begin!