During the 2012 senate election in Hawaii, the incumbent democratic senator was the first United States senator with which kind of ancestry?
United States Senate election in Hawaii, 2012:  Incumbent Democratic U.S. Senator Daniel Akaka decided to retire instead of running for re-election to a fourth term. Daniel Akaka:  A member of the Democratic Party, Akaka was the first U.S. Senator of Native Hawaiian ancestry.
Native Hawaiian