Ben Rhodes has a passage in his book, The World as It Is: A Memoir of the Obama White House, which exemplifies a certain attitude with respect to diplomacy:

There was a final flurry of meetings in late November 2013. As Kerry negotiated in Geneva with the Iranians and the other P5+1 countries, he’d call back with different formulations on the remaining issues. One of the most contentious was an Iranian insistence that we recognize their “right to enrich uranium”—the process necessary for a civil nuclear program (and a nuclear weapons program); we didn’t want to recognize a right to enrich, and we wanted to assert that any Iranian enrichment had to be negotiated with the P5+1. We had conference call after call, arguing over the most minute language, with Susan demanding changes in wording. Kerry reached a breaking point, shouting into the phone—“Susan, this is a goddamn good deal!” I was a little worried, but Susan assured me that she was just bucking him up. “I want John to be as worried about us as the Iranians,” she said.