Trump threatens 35% tariffs on Canadian goods

US President Donald Trump has said he will slap a 35% tariff on Canadian goods starting 1 August, even as the two countries are days away from a self-imposed deadline to reach a new deal on trade.

The missive came as Trump also threatened blanket tariffs of 15% or 20% on most trade partners, and said he would soon notify the European Union of a new tariff rate on its goods.

Trump announced the latest levies on Canada on Thursday in a letter posted to social media and addressed to Prime Minister Mark Carney.

The US has already imposed a blanket 25% tariff on some Canadian goods, and the country is feeling the pain of the Trump administration's global steel, aluminium and auto tariffs.

The letter is among more than 20 that Trump had posted this week to US trade partners, including Japan, South Korea and Sri Lanka.

Like Canada's letter, Trump has vowed to implement those tariffs on trade partners by 1 August.

The US has imposed a 25% tariff on all Canadian imports, though there is a current exemption in place for goods that comply with a North American free trade agreement.

It is unclear if the latest tariffs threat would apply to goods covered by the Canada-United States-Mexico Agreement (CUSMA).

Trump has also imposed a global 50% tariff on aluminium and steel imports, and a 25% tariff on all cars and trucks not build in the US.

He also recently announced a 50% tariff on copper imports, scheduled to take effect next month.

Canada sells about three-quarters of its goods to the US, and is an auto manufacturing hub and a major supplier of metals, making the US tariffs especially damaging to those sectors.

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Trump's letter said the 35% tariffs are separate to those sector-specific levies.

"As you are aware, there will be no tariff if Canada, or companies within your country, decide to build or manufacture products within the United States," Trump stated.

He also tied the tariffs to what he called "Canada's failure" to stop the flow of fentanyl into the US, as well as Canada's existing levies on US dairy farmers and the trade deficit between the two countries.

"If Canada works with me to stop the flow of Fentanyl, we will, perhaps, consider an adjustment to this letter. These Tariffs may be modified, upward or downward, depending on our relationship with Your Country," Trump said.

President Trump has accused Canada - alongside Mexico - of allowing "vast numbers of people to come in and fentanyl to come in" to the US.

According to data from the US Customs and Border Patrol, only about 0.2% of all seizures of fentanyl entering the US are made at the Canadian border, almost all the rest is confiscated at the US border with Mexico.

In response to Trump's complaints, Canada announced more funding towards border security and had appointed a fentanyl czar earlier this year.

Canada has been engaged in intense talk with the US in recent months to reach a new trade and security deal.

At the G7 Summit in June, Prime Minister Carney and Trump said they were committed to reaching a new deal on within 30 days, setting a deadline of 21 July.

Trump threatened in the letter to increase levies on Canada if it retaliated. Canada has already imposed counter-tariffs on the US, and has vowed more if they failed to reach a deal by the deadline.

In late June, Carney removed a tax on big US technology firms after Trump labelled it a "blatant attack" and threatened to call off trade talks.

Carney said the tax was dropped as "part of a bigger negotiation" on trade between the two countries.

The Prime Minister's office told the BBC they did not have immediate comment on Trump's letter.