In 1849 Chief Justice Taney's Court delivered a 5-4 decision on the legal status of immigrants and free blacks under the federal commerce power. The closely divided decision, further emphasized by the fact there were eight opinions, played a part in the increasingly contested politics over growing immigration, and the controversies about fugitive slaves and the western expansion of slavery that resulted in the Compromise of 1850.

In the decades after the Civil War federal regulation of immigration almost entirely displaced the role of the states. Yet, over a century later, Justice Scalia...

In 1849 Chief Justice Taney's Court delivered a 5-4 decision on the legal status of immigrants and free blacks under the federal commerce power. The closely divided decision, further emphasized by the fact there were eight opinions, played a part in the increasingly contested politics over growing immigration, and the controversies about fugitive slaves and the western expansion of slavery that resulted in the Compromise of 1850.

In the decades after the Civil War federal regulation of immigration almost entirely displaced the role of the states. Yet, over a century later, Justice Scalia...