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Good morning and welcome to the Sunday edition of Morning Wire, where we give you the weekend rundown to get ready for the week ahead. Today, the stories of three people who died in the Ceuta migrant surge after they believed false rumors that the border was open; one story of hope after postpartum psychosis; and where to see Thursday’s near-total lunar eclipse.

But first, one of the world’s closest and most durable alliances is being severely tested.

UP FIRST

Prime Minister Mark Carney speaks about Canada's response to new U.S. tariffs during a news conference on Parliament Hill in Ottawa on Saturday. (Patrick Doyle/The Canadian Press via AP)

US and Canada plunge deeper into a trade war

After trade negotiations crumbled at the eleventh hour, U.S. President Donald Trump’s 50% tariffs on scores of Canadian imports kicked in Saturday. The new levies are expected to affect about 5% of Canada’s annual exports to the U.S., roughly $20 billion in goods. Canada’s Prime Minister Mark Carney quickly promised Saturday that his government would roll out “dollar for dollar” retaliatory measures starting Sept. 8. Experts warn steeper tariffs raise costs for businesses and almost always trickle down to households in the form of higher prices. Read more.

TOP STORIES

Migrants who crossed from Morocco into Spain return to a beach after being expelled from the area the previous day, as Spanish police escort them in the Spanish exclave of Ceuta on Friday. (AP Photo/Antonio Sempere)

A physics graduate, a soccer player, a teen who couldn’t swim: They died in the Ceuta migrant surge

Ayoub Akbili needed money for his mother’s surgery. Hamza Haibouri wanted a shot at a professional soccer career. Abdelouahed Iken was chasing the glossy life a friend posted about on Facebook from Italy. So when they heard rumors that Morocco’s border with Spain was open, they decided to join the rush to try to reach Europe. All three died attempting to cross, becoming victims of the deadliest migration crisis between Morocco and Spain. Fueled by misinformation, poverty and lack of opportunities, more than 70,000 would-be migrants from Morocco and beyond swam or climbed over a breakwater last month to try to reach Ceuta, a Spanish territory on the North African coast. At least 90 people died attempting to cross the border, according to official figures. Read more.

As the Clancy case highlights postpartum psychosis, a mom stricken by it shares her story of hope

About two weeks after giving birth, Bridget María Chesterton was curled up on the bathroom floor, saying things that made little sense. The family eventually learned that she had postpartum psychosis. The disorder has been thrust into the spotlight by the case of Lindsay Clancy, a Massachusetts woman on trial for strangling her three children. A key question is whether postpartum psychosis drove her to do it. Researchers estimate the condition afflicts 1 to 2 per 1,000 women after delivery. There are many misconceptions about the disease, and Chesterton wants to dispel those and give other families hope. Read more.