Prime Minister Liz Truss delivers her resignation speech as her husband, Hugh O'Leary, stands nearby at Downing Street in London on Thursday. Truss has been prime minister for just 44 days. Rob Pinney/Getty Images hide caption
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Jo Johnson, brother of Britain's prime minister, Boris Johnson, resigned from Parliament and his brother's Cabinet on Thursday. Kirsty Wigglesworth/AP hide caption
"I think Mexico will step up and do what they should have done," President Trump said at a press conference with British Prime Minister Theresa May after a meeting with her at 10 Downing Street. WPA Pool/Getty Images hide caption
Prime Minister Theresa May announces her resignation outside No. 10 Downing St. in London on Friday. Leon Neal/Getty Images hide caption
U.K.'s Theresa May Resigns Acknowledging Failure To Deliver Brexit
Britain's Prime Minister Theresa May walks out 10 Downing street in London on Wednesday. She announced that if her Brexit deal is approved by Parliament, she will step down from her post. Adrian Dennis/AFP/Getty Images hide caption
British Prime Minister Theresa May leaves after addressing a media conference at an EU summit in Brussels on Friday. Frank Augstein/AP hide caption
Donald Tusk, president of the European Council, speaks to reporters on Wednesday in Brussels. He told British Prime Minister Theresa May that an extension for withdrawal from the EU is possible, but with a caveat. Sean Gallup/Getty Images hide caption
Anti-Brexit activists hold placards and wave flags as they demonstrate outside the Houses of Parliament in London on Tuesday, ahead of a crucial vote on Prime Minister Theresa May's Brexit deal. Tolga Akmen/AFP/Getty Images hide caption
Anti-Brexit demonstrators react after the results of the vote on British Prime Minister Theresa May's Brexit deal were announced in Parliament square in London on Tuesday. British lawmakers have rejected Prime Minister Theresa May's Brexit deal by a huge margin, plunging U.K. politics into crisis 10 weeks before the country is due to leave the European Union. Frank Augstein/AP hide caption
Britain's Prime Minister Theresa May leaves No. 10 Downing St. to attend the weekly Prime Ministers' Questions session on Wednesday. Tim Ireland/AP hide caption
British Prime Minister Theresa May (center) leaves a meeting Tuesday in Berlin beside German Chancellor Angela Merkel. Faced with turmoil back home, May has embarked on an international trip to shore up assurances from the European Union. Michael Sohn/AP hide caption
The Union Jack flies above the Palace of Westminster, the seat of Parliament in London. U.K. lawmakers are expected to decide soon the fate of a draft Brexit deal negotiated between Prime Minister Theresa May and the European Union. Daniel Leal-Olivas/AFP/Getty Images hide caption
Demonstrators hold placards in London on Friday. Alastair Grant/AP hide caption
Here's What You Need To Know About Brexit After A Tumultuous Week In The U.K.
British Prime Minister Theresa May leaves No. 10 Downing St. for the Houses of Parliament on Thursday. Her speech there defending the tentative Brexit deal did little to calm critics — either among her political rivals or within her own party. Tim Ireland/AP hide caption
Pro-European Union protesters demonstrate against Brexit outside the House of Parliament on Tuesday in London, as Prime Minister Theresa May was reaching an agreement with the EU. Jack Taylor/Getty Images hide caption
U.K. And EU Finally Agree On Brexit Text, But It's Already Getting Slammed
British Prime Minister Theresa May dances up to the podium for her speech Wednesday at the Conservative Party Conference in Birmingham, U.K. Christopher Furlong/Getty Images hide caption
British Prime Minister Theresa May meets with South African President Cyril Ramaphosa in Cape Town, South Africa, during a three-nation visit to Africa. May has promised to boost Britain's investment in the continent. AP hide caption
U.S. President Donald Trump and first lady Melania Trump disembark from Air Force One as they arrived in Scotland on Friday. Peter Morrison/AP hide caption
People in Edinburgh, Scotland, march in protest against President Trump during his first official visit to the U.K. Jeff J. Mitchell/Getty Images hide caption
A 20-foot-tall blimp depicting President Trump as a cartoon baby stands inflated in London's Bingfield Park. It will hover above Parliament Square later this week during the president's visit. Matt Dunham/AP hide caption
'We Need To Take A Stand': U.K. Protesters Mobilize For Trump's Visit
Demonstrators gather in Dublin on Saturday, awaiting the final results of Ireland's referendum on abortion. Ultimately, Irish voters backed repeal of the ban — but, as evidenced by their signs, those in favor of repeal were already thinking of what may happen next in Northern Ireland. Paul Faith/AFP/Getty Images hide caption
President Trump meets with British Prime Minister Theresa May on Thursday at the World Economic Forum in Davos, Switzerland. Evan Vucci/AP hide caption
President Trump shakes hands with British Prime Minister Theresa May during their meeting at the Palace Hotel during the United Nations General Assembly in September. Evan Vucci/AP hide caption
Britain's Prime Minister Theresa May prepares to greet Spain's prime minister outside No. 10 Downing St. in central London on Tuesday. Steve Back/Getty Images hide caption