President Barack Obama got four mayors to fully endorse his nationwide program to “build welcoming communities” for millions of “new Americans” and roll out the red carpet. Atlanta Mayor Kasim Reed — who recently made headlines for terminating his city’s fire chief over a Christian book that described homosexual behavior as sin — signed on late last month to join three other mayors of major American cities: Los Angeles’ Eric Garcetti, Chicago’s Rahm Emanuel and Nashville’s Karl Dean. Reed’s message to the millions of refugees and immigrants entering the country: Come to Atlanta. “Reed became the nation’s fourth mayor to...