The story of religion in the United States is the story of immigration. Ongoing waves of newcomers to this country, in combination with internal developments, have assured that no nation on earth has experienced such wholesale changes in its religious makeup or had such a lavish variety of faiths from which to choose. A brief survey of the past two centuries illustrates the point—and suggests no diminution of the trend in the future.
Although it is unlikely the sanctions will have much practical effect in either case, it is significant and unprecedented that two NATO allies have sanctioned members of each other's government.
Trump will not back down until Brunson is home, while Erdogan does not want to look like he capitulated to the Americans.