Eugene Allen, who endured a harsh and segregated upbringing in his native Virginia and went on to work for eight presidents as a White House butler, died March 31 of renal failure at Washington Adventist Hospital in Takoma Park. He was 90. Mr. Allen and his wife, Helene, were profiled in a Washington Post story in 2008 that explored the history of blacks in the White House. The couple were excited about the possibility of Barack Obama's historic election and their opportunity to vote for him. Helene, however, died on the eve of the election, and Mr. Allen went to...