Prime Minister Mark Carney says U.S. President Donald Trump’s new 50 per cent tariffs amount to an economic “attack” on Canada. He has vowed “dollar for dollar” retaliatory tariffs on Sept. 8.

<p>Prime Minister Mark Carney says U.S. President Donald Trump&rsquo;s new 50 per cent tariffs amount to an economic &ldquo;attack&rdquo; on Canada. He has vowed &ldquo;dollar for dollar&rdquo; retaliatory tariffs on Sept. 8.</p>

CTV National News is Canada's most-watched national news program. Now you can stay up to date Monday to Sunday with the CTV National News Podcast, delivered nightly. Listen to Canada’s most trusted newscast featuring stories from here and around the world with a perspective that is distinctly Canadian and backed by the #1 news organization in Canada.

<p>CTV National News is Canada's most-watched national news program. Now you can stay up to date Monday to Sunday with the CTV National News Podcast, delivered nightly. Listen to Canada&rsquo;s most trusted newscast featuring stories from here and around the world with a perspective that is distinctly Canadian and backed by the #1 news organization in Canada.</p>