Disappeared News

Daughter of James Campbell [1826-1900], a wealthy industrialist, and Abigail Kuaihelani Maipinepine Parker [1859-1908] and married to HH Prince David Laamea Kahalepouli Kawananakoa. heir to the throne of the Kingdom of Hawaii.

From the Wikipedia (there may be better references, I'll look for next time):

Upon the death of her brother-in-law, Prince Jonah Kuhio Kalanianaole in 1922, Princess Abigail assumed the role of heir to the throne.

In 1924 she became the Republican national committeewoman for Hawaii and served in that capacity for twelve years. Her prominence on the national stage made Princess Abigail a role model for women in Hawaii.

Again from the Wikipedia:

The House of Kawananakoa survives today and is the only recognized royal family of the United States. Members of the family retain the titles of prince and princess, honorifics that have been bestowed upon them by the residents of Hawaii as a matter of tradition and respect of their status as alii or chiefs of the native Hawaiians, being lines of ancient ancestry.
...
Should the Hawaiian sovereignty movement succeed in the reinstitution of the Hawaiian monarchy, the heir presumptive would be declared monarch with the mandate of a plebiscite and constitution.

(Many thanks to Scott Crawford over in Hana, Maui, and his Hawaiian Independence Blog, for starting a cultural and historical calendar, on which this is based.)