Haley Stevens, a sitting Democratic congresswoman, stood alongside the Republican Senate candidate Mike Rogers on Sunday.
It was a surprise appearance that saw Stevens endorse the Republican candidate in the state's crucial US Senate contest, instead of her fellow Democratic nominee Abdul El-Sayed.
BBC's Nada Tawfik was in Detroit, Michigan where the party spat unfolded.
Follow our coverage of the US midterm elections here.
The BBC's Ione Wells looks at what Pike says in her statement about surviving two lethal injection attempts.
The renowned British actor died after "a brief and poignant journey" with Alzheimer's disease and Lewy Body Dementia, his spokesperson says.
Admirers of the Star Trek actor gathered at his Hollywood Walk of Fame Star in Los Angeles to pay tribute to his life and acting career.
The actor was a familiar face across the BBC over the years, appearing on programmes like The Graham Norton Show and HARDTalk.
The BBC's Ione Wells looks at whether the defeated right-wing presidential candidate travelled to the US to avoid an ongoing criminal investigation.
The BBC's Ione Wells unpacks Bolsonaro's journey to Miami after losing Brazil's presidential election and facing a passport surrender order.
The defeated Brazilian presidential candidate arrived in the US by private jet on Tuesday morning with his wife and two daughters.
The BBC's Ione Wells explains recent developments after the US said it would issue visas to the defeated right-wing presidential candidate and his family.
Cuban delegates reacted in response to claims from US ambassador Mike Waltz that the Havana government has profited off the forced labor of its citizens.
Maya Turner was recently named one of the University of Manitoba's seven captains, becoming the first woman to hold the position in the school's history.
President Zelensky says limits to the technology continue to affect Ukrainian forces, while US officials and Elon Musk offer conflicting accounts of who controls it.
The BBC's Madeline Halpert spoke to city tourists, residents and horse carriage workers about the industry and their opinion on the ban.
Videos from the Arizona capital show people sheltering inside a car as hail smashes the windscreen, while intense downpours covered neighbourhoods in ice.
The BBC's Tom Bateman traveled to Springfield to see how President Donald Trump's immigration policies are affecting the community.
Preliminary referendum results show that more than two-thirds of Alberta voters support remaining part of Canada, easing concerns over national unity.
Synthetic opioids like fentanyl are more powerful and in plentiful supply, and they have transformed the drugs landscape.
The BBC's Quentin Sommerville spoke to the daughter of a former heroin addict about the effect drugs have had on her family.
Albertans are voting on whether to stay in Canada or pursue independence via a referendum, splitting even some close-knit families.
The BBC's Quentin Sommerville reports from Chicago, where communities are battling a new wave of synthetic drugs.
BBC News hears from users, dealers, prison and recovery workers as America battles with a deadly new drug epidemic.
