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theresa may

Updated at 5:49 a.m. ET

Theresa May will step down as prime minister of the United Kingdom on June 7, she said Friday at No. 10 Downing St.

She came to the job in 2016 after U.K. voters backed plans to exit the European Union in a referendum. For the following three years, she attempted to navigate the difficult and complex process of making that happen.

"I feel as certain today as I did three years ago that in a democracy, if you give people a choice, you have a duty to implement what they decide," she said. "I have done my best to do that."

Updated Thursday at 9:38 a.m. ET

This week marks a turning point for Britain and Brexit. On Tuesday, the British Parliament voted down Prime Minister Theresa May's Brexit plan for the second time. On Wednesday, lawmakers voted against a "no-deal Brexit" — leaving the European Union without a formal agreement with Brussels.

Today, they will vote on whether to postpone Brexit beyond the scheduled departure date of March 29.

Here's what you need to know.

What happened on Tuesday?

Updated at 5:24 p.m. ET

With the U.K. fast approaching the March 29 deadline for when it will leave the European Union, the prospects for an orderly, on-time Brexit — or even any Brexit at all — have dimmed considerably. On Tuesday evening, British lawmakers rejected the deal Prime Minister Theresa May had reached with the EU, opening a Pandora's box of possible outcomes to be considered in the weeks to come.

And the result of the critical vote wasn't even particularly close.

Updated at 12:35 p.m. ET

British Prime Minister Theresa May has postponed a critical vote on the draft Brexit deal she negotiated with the European Union, conceding that it would not have enough support to pass Parliament if the vote were held Tuesday as scheduled.

"I've listened very carefully to what has been said in this chamber and out of it, by members from all sides," May told the House of Commons on Monday, only to be interrupted by a peal of derisive laughter from lawmakers.

Updated at 12:15 p.m. ET

The U.K. and the EU might "create an option to extend the [Brexit] implementation period for a matter of months," U.K. Prime Minister Theresa May said Thursday after talks with European Union leaders stalled in Brussels.

The Brexit timetable currently calls for a 21-month transition to begin next March. But that could be in jeopardy, as negotiators have been unable to get past sticking points in laying out the terms of the U.K.'s departure from the EU.

British Prime Minister Theresa May has announced that she is calling for an early election on June 8, describing it as the "only way to guarantee certainty and stability for the years ahead" as the U.K. prepares to negotiate its exit from the European Union.

The decision was immediately welcomed by the head of the Labour Party, Jeremy Corbyn. He called it a "chance to vote for a government that will put the interests of the majority first."

Britain's prime minister said Tuesday that the United Kingdom will walk away from the European Union's single market and unified court system, making a sharp break with its largest trading partner.

In a speech delivered about six months after voters passed a referendum requiring Britain to leave the EU, Prime Minister Theresa May laid out a plan for what that split would look like, emphasizing limits on migration into the country.