BUFFALO, N.Y. — Metal Supermarkets in North Buffalo specializes in small quantities of metals custom cut to order.

"We carry aluminum, stainless steel, carbon steel, along with tool steel, alloys, we try to carry a little bit of everything in the store so we have what people need when they need it," said owner Dave Penharlow.

Penharlow says they get a lot of their aluminum products from Canada, and he worries about the new tariffs the U.S. just imposed on Canadian steel and aluminum.

"We're seeing more increases in pricing across the board. But, again aluminum I think has been the most sensitive. We've seen increases of 30, 40 percent, or even more since the beginning of this year. And I think the Canadian tariffs will add a ten percent surcharge to aluminum pricing, it's going to bring up the price a bit more," said Penharlow.

That's why Erie County Executive Mark Poloncarz, Buffalo Niagara Partnership President Dottie Gallagher-Cohen and the head of the Hamilton Ontario Chamber of Commerce are calling on President Trump to end the tariffs.

"Instead of making deals with dictators it is time to focus on our friends because that is where real power and prosperity come from," said Keanin Loomis, Hamilton Chamber of Commerce president.

"These tariffs are not solving problems, instead damaging the economic bounds that bring us together. In the end, these tariffs and the acrimony created by them only weaken our two great nations. No one wins by engaging in a trade war," said Poloncarz.

According to the U.S. Chamber of Commerce, Canada is New York's number one trading partner, with New York exporting $15 billion worth of goods to Canada every year.

"That's really what our appeal is about, to really look at this relationship and as David said, exclude Canada from this particular set of tariffs," said Gallagher-Cohen.

With Canadian Prime Minister Justin Trudeau announcing a list of tariffs on U.S. imports in retaliation to U.S. tariffs, it remains to be seen if either side will back down anytime soon.