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.
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.
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.
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.
Europe's traditional centrist coalition lost its majority, with far-right populist parties and liberal, pro-European Union parties gaining ground. The results suggest a complicated future for the EU.
Roger Cohen, columnist for The New York Times, analyzes the European Union vote for NPR's Mary Louise Kelly, including the high turnout and the success of the EU's green parties.
Theresa May's term as prime minister has been one misstep after another, starting with calling an early election that left her weakened and without support to negotiate the U.K.'s exit from the E.U.