The world at a glance

Trump challenger: The radio host and former congressman Joe Walsh (pictured) has announced that he will challenge Donald Trump for the 2020 presidential nomination – becoming the second Republican to do so. A former Trump supporter and member of the Tea Party movement, Walsh described the president as “unfit” for office and said he “lies virtually every time he opens his mouth”. Trump’s other challenger, Bill Weld, has made little impact, but commentators think Walsh, who has promised to “get in the president’s face every day”, could be more disruptive to his re-election campaign.

Washington DC

Child detention protections removed: The Trump administration has announced new detention rules that would radically scale back the protections for child migrants in America. Under the existing Flores agreement, undocumented children must be held in the “least restrictive settings” and released as soon as possible, ideally within 20 days. The agreement also entitles lawyers to monitor their detention. But the new rules, which are due to come into force in 60 days, scrap these provisions. Trump described it as a “humanitarian” move to counter the “illegal flow” of children to the US, but critics say it will effectively mean that migrant children can be held in detention centres indefinitely.

Oklahoma City

Opioid fine: The pharmaceutical giant Johnson & Johnson was this week ordered to pay $572m to the state of Oklahoma, for its contribution to America’s opioid epidemic. In the landmark ruling, a judge decreed that two of the drug company’s painkillers, Duragesic and Nucynta, had created a “public nuisance”. Earlier this year, Oklahoma settled with the maker of OxyContin, Purdue Pharma, for $270m, and with Teva Pharmaceutical for $85m, leaving Johnson & Johnson the lone defendant in the case. The company, which argued that its products had played only a small role in the epidemic, has vowed to appeal the fine. The case was the first of thousands being brought in the US against opioid makers and distributors, and could set an important precedent.

New York

Chicago, Illinois

Epstein victims speak: Sixteen of Jeffrey Epstein’s alleged victims spoke in court this week at a final hearing into the criminal case ended by his death. Many of the women said the financier, 66, had cheated them of justice by taking his own life. Courtney Wild, who says she was sexually abused by him aged 14 after being hired to give massages on his private jet (the “Lolita Express”), called him a “coward”. Others delivered their testimony in tears. Outside the Manhattan court, Virginia Giuffre, who says she was used as a “sex slave” from the age of 15, repeated her claim that she was forced to have sex with Prince Andrew three times, and urged him to “come clean”. The Prince has strenuously denied any wrongdoing, and says he knew nothing of Epstein’s alleged crimes ( see page 20).

Cape Canaveral, Florida

Space crime: A US astronaut has become the first person to be accused of committing a crime in space. After breaking up with her wife, Summer Worden, last year, Anne McClain (pictured) went on a mission to the International Space Station, during which she logged into Worden’s bank account – prompting her ex to file a complaint with the Federal Trade Commission. McClain’s lawyer said she was merely “shepherding the couple’s still-entwined finances”, and was unaware that Worden didn’t want her to use the account. Nasa is investigating the complaint.

New York

Business the B Corp way: Leading members of the increasingly influential B Corp movement have taken out a full-page ad in The New York Times urging the bosses of some of the US’s biggest companies – including Jeff Bezos of Amazon and Tim Cook of Apple – to follow their approach to business. The open letter was signed by more than 30 business leaders, and addressed to the powerful Business Roundtable lobby group. Our “better model of corporate governance”, says the ad, “gives us, and could give you, a way to combat short-termism”. Companies who sign up to the B Corp movement agree to place their impact on society and the environment on an equal footing with profits, as part of a so-called “triple bottom line”. Certification is overseen by the non-profit organisation B Lab, and so far 2,933 companies worldwide have successfully applied to become B Corps.

Quito

Migrant clampdown: Ecuador has joined Peru and Chile in introducing new restrictions on migrants from Venezuela. To cross the border legally, Venezuelans must now present a visa (applied for in advance) and a valid passport. In the month before the new rules came into force, an estimated 85,000 Venezuelans crossed from Colombia into Ecuador; and in the hours before the deadline, more than 10,000 seized their chance to get to the border, leading to long queues on the Colombian side. Hundreds who did not get across in time were left stranded. Ecuador is now home to around 320,000 people who have fled the political and economic crisis in Venezuela; around 1.4 million have settled in Colombia.