Right, but think of the forms that are being referred to. A passport application form asks your nationality, because the passport you will be carrying serves as proof of nationality. And African-American is not a nationality. Nobody would write "African-American" on their passport application. I have owned quite a few passports, but I don't recall any of the application forms asking me to identify my race.
The whole Race/Ethnicity multiple choice thing on forms is ridiculous, in that it is both too general ("Asian/Pacific Islander"? Really? A Kazakh has little in common with a Samoan, and neither has much in common with a Sikh or a Cambodian, but all are "Asian/Pacific Islanders) or else too specific ("Caucasian, non-Hispanic": a blue-eyed, blonde haired third-generation Argentinian-American named Gustav can't check that box, but a dark-skinned, black-haired, brown-eyed Greek-American named Milo can. And yet, on the street, who would be mistaken for a Mexican, and who would be a poster boy for the Master Race?).
Let's call the whole thing off.