Britain's withdrawal from the European Union becomes official at 11pm eastern tonight. The departure was triggered after former British Prime Minister David Cameron called for a referendum on the UK's membership, setting Brexit in motion. Cheddar spoke to Lauren Baer, a former senior advisor to Secretaries of State Hillary Clinton and John Kerry, and to U.S. Ambassador to the United Nations Samantha Power, under the Obama Administration, about the political divide in Britain and what this means for the UK's relationship with the United States.