Greenlanterncorps
Banned
Between 1901 and 1904 a series of little known but influential cases in the Supreme Court called the Insular cases set the stage for US relations with it's acquisitions from the Spanish-American War.
Prior to the war all US acquisitions of territory were automatically incorporated into the United States. After the Insular cases a legal distinction between "incorporated territories" (Indian Territory, Oklahoma, New Mexico, Arizona, Alaska, Hawaii) and "unincorporated territories" (American Samoa, Guam, The Philippines, Puerto Rico) was drawn.
What if the court did not draw that distinction? The Constitution is held to fully apply to those territories. There are no legal trade barriers, and they have citizenship from the moment of annexation. Therefore there is no legal impediment to prevent migration to "the mainland" from the Philippines (Which were the only territory to have such barriers for an extended period in our timeline).
What happens?
Prior to the war all US acquisitions of territory were automatically incorporated into the United States. After the Insular cases a legal distinction between "incorporated territories" (Indian Territory, Oklahoma, New Mexico, Arizona, Alaska, Hawaii) and "unincorporated territories" (American Samoa, Guam, The Philippines, Puerto Rico) was drawn.
What if the court did not draw that distinction? The Constitution is held to fully apply to those territories. There are no legal trade barriers, and they have citizenship from the moment of annexation. Therefore there is no legal impediment to prevent migration to "the mainland" from the Philippines (Which were the only territory to have such barriers for an extended period in our timeline).
What happens?