It's not just prices going up, some US businesses are losing markets.
Canada has pulled US liquor off their shelves. One distiller in California will see their market shrink by $200 million. Same with companies back East.
It's not going to amount to much nationwide, but Canada is also looking at cancelling their F-35 order.
Canadians can hold a grudge. These markets won't be coming back anytime soon, if ever.

And from the rumor mill; Some Canadians coming into the US are having their cell phones searched for anti-trump sentiment. I have my doubts it's true, but the fact that it could be is frightening.