In a dramatic day, a defection robbed Johnson's ruling Conservative Party of its single-seat majority in Parliament and lawmakers set the way to vote to prevent the U.K. from a no-deal Brexit.
The leader of Britain's House of Commons called those opposed to the move "phony" and questioned whether lawmakers have the "courage or the gumption" to bring down the government.
In response, European Council President Donald Tusk says the idea would lead to reestablishing a border. Johnson calls the backstop deal "inconsistent with the sovereignty of the U.K."
Britain's prime minister vows to bring the country out of the European Union at the end of October — deal or no deal. Here are some of the key challenges he faces.
The results of the special election leave the ruling prime minister's government with a single-seat majority just as he tries to navigate a difficult departure from the EU.
The polarizing and showboating new prime minister has vowed to deliver on the U.K. leaving the European Union in October, whether or not a deal is reached.
At a time of polarization and political chaos, the United Kingdom and the United States are about to be led by two remarkably similar figures. Johnson will take office on Wednesday.
Johnson will inherit a slate of problems from Theresa May, including a small majority in Parliament, government resignations and escalations with Iran. And then there's Brexit.
Kim Darroch resigned as ambassador to the U.S. after communications in which he criticized the Trump administration were leaked. The British government says it is investigating how it happened.
A British court is ordering Boris Johnson to face accusations that while holding public office he repeatedly lied by saying Britain paid £350 million each week to be in the EU.
British Foreign Secretary Boris Johnson says the Iran deal can help avoid a nuclear arms race in the Middle East — one that would also include Saudi Arabia.
Meet Anna Catharina Bischoff, an 18th century syphilitic woman found in 1975. Researchers announced her name Thursday. And the U.K. foreign secretary says he's "very proud" to have the new family tie.
The populist ex-mayor of London, a vocal proponent of the Brexit, was considered a top candidate to replace David Cameron as prime minister. Then one of Johnson's allies announced his candidacy.
Johnson took a gamble by leading the campaign for Britain to leave the EU. He's now a leading candidate to replace his college friend and fellow Conservative David Cameron.
Johnson, who holds dual U.S.-U.K. citizenship, had called the IRS bill "outrageous" and said he wouldn't pay it. But The Financial Times reports he has settled the approximately $44,000 bill.
