Canadian Prime Minister Mark Carney said Canada is now 'at war' with the United States over trade, after talks between the two countries broke down.
The United States has asked allied countries and China to join a campaign of economic sanctions against Iran, part of President Trump's effort to raise pressure on Tehran during a stalled war.
Donald Trump says he is starting a major economic campaign to punish any country doing business with Iran, calling it the toughest such effort yet.
The US and Canada have been in stalled trade talks, with Washington threatening to raise tariffs (taxes on imported goods) on Canadian products to 50%.
Iran's parliament speaker said Tuesday that forces will keep the Strait of Hormuz, a narrow sea passage that much of the world's oil ships through, closed until the US meets terms from an earlier agreement.
President Trump said the US would bomb Oman if the Gulf country 'gets in the way' over the standoff with Iran, the BBC reports.
President Trump ordered the Pentagon to reduce planned joint military exercises with South Korea, an ally the US has long worked with to deter North Korea.
Jared Kushner, a senior adviser to US President Donald Trump, held a rare direct meeting with a Hamas leader to try to revive a stalled Gaza peace plan, a week after Israel rejected it.
President Donald Trump says he will declare the Strait of Hormuz, a narrow sea passage between Iran and the Arabian Peninsula, part of United States territory.
President Trump said the aircraft carrier USS Abraham Lincoln, which has spent a record nearly nine months at sea backing US operations against Iran, will keep deploying, dismissing concerns about sailors' mental health.
Iran has said it will only reopen the Strait of Hormuz, a narrow sea passage that much of the world's oil ships through, if the United States lifts its economic sanctions on Iran.
President Donald Trump confirmed he personally approved a Secret Service request to switch the aircraft he was flying during this month's NATO summit in Turkey, after a threat linked to Iran targeted Air Force One, the plane presidents normally use.