Liveblogging Obama's Speech

U.S. Barack Obama took race head-on at the opening of his speech, referring to the U.S. Constitution as an unfinished document stained by this nation's original sin of slavery.  He spoke of the struggle for civil rights and says he chose to run for president now, "To continue the long march of those who came before us, a march for a more just, more equal, more free, more caring and more prosperous America."

Obama goes on to say some critics have said he was too black while others have complained that he was not black enough.  He is now talking about the controversial racial remarks of his church pastor as a "profoundly distorted" view of America.