evidence: On Nov. 25, 2018, Britain and the EU agreed on a 599-page Withdrawal Agreement, a Brexit deal that touched upon issues such as citizens’ rights, the divorce bill, and the Irish border. Parliament first voted on this agreement on Jan. 15, 2019. Members of Parliament voted 432 to 202 to reject the agreement, the biggest defeat for a government in the House of Commons in recent history. [...] The issue was further complicated by the Tories’ choice of the Northern Irish Democratic Unionist Party as a coalition partner. The party opposed the Good Friday Agreement and, unlike the Conservative leader at the time, campaigned for Brexit. Under the Good Friday Agreement, the U.K. government was required to oversee Northern Ireland with "rigorous impartiality." That proved difficult for a government that depended on the cooperation of a party with an overwhelmingly Protestant support base and historical connections to Protestant paramilitary groups.