Trade talks collapsed between Canada and the United States on Friday and Prime Minister Mark Carney said Ottawa would be retaliating with “dollar-for-dollar” tariffs. President Donald Trump is vowing to double tariffs on imported Canadian vehicles and parts to 50% starting January 1. Key points and original sources are listed below.

• Trade talks collapsed between Canada and the United States on Friday and Prime Minister Mark Carney said Ottawa would be retaliating with “dollar-for-dollar” tariffs.S1

• President Donald Trump is vowing to double tariffs on imported Canadian vehicles and parts to 50% starting January 1. Canada is ready to fight back. Talks broke down on Friday. Bloomberg's Brendan Murray looks at why Trump is starting a new trade fight with hi...S2

• After President Donald Trump imposed 50% tariffs on some Canadian goods, Canada is saying it has leverage. “We have what the world wants,” Prime Minister Mark Carney said. Meanwhile, Trump’s pressure campaign on Iran is underway with what he calls “economic D-...S3