Announcement of tariffs on $20bn worth of US goods follows through on Mark Carney's vow to match US tariffs 'dollar for dollar' .. Existing Canadian counter-tariffs on US vehicles will remain in place. Key points and original sources are listed below.

• Announcement of tariffs on $20bn worth of US goods follows through on Mark Carney's vow to match US tariffs 'dollar for dollar' ..S1

• Existing Canadian counter-tariffs on US vehicles will remain in place.S2

• Donald Trump intensified the confrontation earlier by saying the US was considering renaming Lake Ontario “Lake America”S3

• Canada on Tuesday announced retaliatory tariffs on C$27.6 billion ($19.94 billion) worth of US goods, including steel and dairy products, in a dollar-for-dollar response to President Donald Trump's punitive tariffs on Canadian products. Ottawa also announced a...S4

• Canada struck back at the United States on Tuesday with retaliatory tariffs on about USD 20 billion worth of American goods, including steel, dairy products, appliances and farm equipment, as the trade war between the once-friendly neighbours escalated sharply...S5

• Canada To Impose Up To 50% Tariffs On 700 US Goods As Trade War EscalatesS6