The decision by U.S. President Donald Trump to target Canada’s dairy producers over trade issues is not a fair one, according to a University of Guelph professor.

“The U.S. imports a large quantity of milk into Canada, at five times what Canada exports to the U.S.,” said Michael von Massow, a professor in the Department of Food, Agricultural and Resource Economics who has been interviewed by national media in the past week.

Earlier this week, Trump said Canada is being unfair to U.S. farmers. He made the statements after a visit to Wisconsin, where politicians and lobby groups asked for help after a local processor cancelled farmers’ contracts to export ultra-filtered milk to Canada.

“I find it somewhat ironic that on the day when the president is calling for protectionist measures to take place in the U.S. with steel, he is accusing Canada of being protectionist in regards to dairy,” von Massow said during a live interview with Business News Network April 19. The National Post,  CityNews, The Huffington Post and the Canadian Press also quoted von Massow in news reports.

Canadian dairy farmers have adjusted their pricing to sell their supply of ultra-filtered milk, a protein-heavy concentrate used to make cheese, said von Massow, who studies agricultural economics and food value chains.

“Canada is not dumping milk in the American market, but rather it is looking to sell it in the domestic market. In my view, this is how the free market is supposed to work.”