Canada hasn't (yet) issued a travel advisory. However, I have had a personal travel ban to the US for several years, just on general principles: I didn't want to be arrested for using the washroom.
But that was then; this is now. It is just not worth taking the risk of trying to enter the US, even though my documents are all in order. I could get disappeared and sent to a concentration camp in El Salvador. It is much worse than it was, and so not worth it.
The only saving grace for Canadians is that, if you fly, you clear US Customs and Immigration on Canadian soil. They can refuse you entry, but they have no jurisdiction to detain you. That is not the case if you travel by road, though. I have no intention of finding out.