This weekend, President Joe Biden is headed to Europe. His first stop: the U.K. Biden is scheduled to meet with both His Royal Highness King Charles, an old acquaintance and fellow head of state; and the Right Honorable Rishi Sunak, Britain’s prime minister and a fellow head of government – who just visited Biden in Washington this past month. On the agenda for these meetings: climate change, the war in Ukraine, and the “Atlantic Declaration” – that’s the diplomatic term for Biden and Sunak’s push to renew the U.K. and America’s partnership across a host of economic and security issues facing the West. Joining to talk about these issues as well as Britain and America’s special relationship is Karen Pierce, the British Ambassador to the United States. Pierce is one of the U.K.’s most experienced diplomats, having held an array of senior positions including ambassadorships to the U.N., the WTO, and Afghanistan; as well as directing British policy throughout South Asia, Pakistan,...