Weak position
Canada cannot negeotiate from its weak position, we need them more than they need us (at this time) The US seems to ignore the fact that Cda is the largest supplier of oil to the US, not the arabs etc..but, in any trade war, there are usually only losers not real winners and we would not win that war at this time.
FTA has been good for Cda but critics love to denigrate anything that is not socialistic in its foundation even though FTA has great benifits for Mexico and its social ills.
If Trudeau had not gone nuts on his great social policies we might have made FTA stronger for Canada but those policies have taxed us into a second rate economy with the taxpayer footing the bills.
So, stay away from FT wars with the US, we dont have big enough balls or enough sperm ..