American diplomats are supposed to represent the nation, advocate for the interests and policies of the U.S. government, and stay on generally good terms with the country to which they're assigned. Even when they are sent to places that have an adversarial relationship with the United States, they are expected to maintain decorum while conveying messages these regimes may not want to hear.
JOHANNESBURG, South Africa This weekend's G20 Leaders' Summit in South Africa was unusual for several reasons. The first summit on the African continent was also the first time the U.S. had boycotted the summit of the world's largest economies. It was also unprecedented in that the group of disparate nations agreed to a declaration at the meeting's start rather than its conclusion, and that there was no ceremonial handover between the outgoing and incoming G20 chairs.
One of the many known unknowns, however, of a Trump state visit is what kind of Trump will show up when a microphone is placed in front of him. The US president is often a bundle of contradictions. During his first state visit in 2018 most UK diplomats said he was a picture of affability, yet he took it upon himself to conduct an interview with the Sun in which he insulted Theresa May, and said Boris Johnson would make a great prime minister.