President Trump on Tuesday picked another fight with another country — slamming Canada for taxing certain milk imports from dairy-farming states like Wisconsin and New York.

“In Canada, some very unfair things have happened to our dairy farmers and others and we’re going to start working on that,” Trump said at a tool factory in Wisconsin, where he signed an executive order dubbed “Buy American, Hire American.”

“What’s happened to you is very, very unfair. It’s another typical one-sided deal against the United States, and it’s not going to be happening for long.”

Canada has slapped import taxes on ultra-filtered milk, a protein liquid concentrate used to make cheese. It had been duty-free, but Canada changed course after its milk producers complained about losing market share.