'We don't need them': Trump uses exec order signing to launch fresh attacks

President Donald Trump complained about Canada during an executive order signing session in the Oval Office Monday, saying "They're very tough to do business with."

"Canada is very tough. They're very, very tough to do business with. And we can't let them take advantage of the U.S.," Trump said.

Trump imposed a 25% trade tariff on Canada over the weekend, prompting Prime Minister Justin Trudeau to impose a retaliatory 25% tariff on U.S. goods. The two leaders spoke by phone Monday morning and were set for a follow-up call in the afternoon.

"And look, I think we're going to have another good conversation today. We're actually speaking at 3 again, but we don't need them to make our cars. We don't need them to give us lumber. We don't need them for agricultural products because we have all the agriculture we need.

"They don't take our agricultural product, for the most part, our milk and dairy, etc. A little bit they do, but not much. We take theirs. And as far as cars are concerned, they took in a big percentage, almost 19% of the market, and, you know, I wouldn't mind making our cars in the United States. So, we have a problem there."

Watch the clip below via CNN.