Senator-elect Barack Obama walks down Adams Street as he greet commuters on Nov. 3, 2004, at Union Station in Chicago. Obama defeated Republican Alan Keyes in the general election. (Scott Strazzante/Chicago Tribune)
2004: Democrat Barack Obama was elected to the U.S. Senate. In defeating Republican Alan Keyes by the largest margin ever in a Senate contest in Illinois, the 43-year-old Obama became the only African American elected that year to the world’s most powerful legislative body and only the third since Reconstruction.

