Robert Lighthizer, President Donald Trump's trade ambassador, says the U.S. has made a formal request for consultations to address Canada's limits on a variety of dairy products.

Canadian officials on both sides of the border have been talking about plans to sell the U.S. on a different approach: "Buy North American."

The Washington-based Plastics Industry Association added its voice this week to a chorus of complaints about the proposal to ban some single use plastics.

The Trump administration's move to ban the popular app over cyber security concerns has since raised the same question for their neighbours north of the border.

Trudeau said he made that point to the U.S. president in a phone call earlier Monday.

Steve Verheul say that under the terms of the May 2019 agreement on tariffs, Canada would be able to impose retaliatory levies against American aluminum.

Prime Minister Justin Trudeau declined to join the talks, citing the ongoing COVID-19 pandemic, this week's pressing parliamentary business and the continuing threat of renewed U.S. tariffs against Canadian aluminum exports.

Under the new CUSMA agreement, Canada will provide U.S. dairy farmers access to about 3.5 per cent of its $16 billion annual domestic dairy market.

Let's cut to the bottom line: Prime Minister Justin Trudeau and U.S. President Donald Trump really don't like each other, Bill Kelly says.

He said that the two leaders will instead talk by telephone later on Monday morning.