well yes, as long as your doing the research. Polling figures, and voter registration numbers are important here.
and, BTW, the US Census department does not list "Hispanic" as a a singular classification. So where do those numbers really come from?
OK, from the CIA Factbook
white 81.7%, black 12.9%, Asian 4.2%, Amerindian and Alaska native 1%, native Hawaiian and other Pacific islander 0.2% (2003 est.)
note: a separate listing for Hispanic is not included because the US Census Bureau considers Hispanic to mean a person of Latin American descent (including persons of Cuban, Mexican, or Puerto Rican origin) living in the US who may be of any race or ethnic group (white, black, Asian, etc.)
Given the number of Hatians and Cubans who ID as black, the number is more than 15, hence, rounded up to 20.
And, the number of AAs in like North Dakota is less than 100, those numbers are grouped in the South, more than the rural midwest, or InterMountian states.