Sentence:  The country's first <WSD>black</WSD> president, and its first president to reach adulthood after the Vietnam War and Watergate, Mr. Obama seemed like a digital-age leader who could at last dislodge the stalemate between those who clung to the government of the Great Society, on the one hand, and those who disdained the very idea of government, on the other. 
Meaning of the word marked with <WSD> tags:  Of or relating to any of various ethnic groups having dark pigmentation of the skin.