“I chose the number of the bill, 40, as a symbol of the forty acres and a mule that the United States initially promised freed slaves. This unfulfilled promise and the serious devastation that slavery had on African-American lives has never been officially recognized by the United States Government.”

2010s, 2016, August, Speech in Jackson, Mississippi (August 24, 2016)

Mark Chen (2016) cited in " US ‘one China’ policy debated at forum http://www.taipeitimes.com/News/front/archives/2016/12/15/2003661235" on Taipei Times, 15 December 2016

Speech (1859)

1860s, Emancipation Proclamation (1863)
Context: And by virtue of the power, and for the purpose aforesaid, I do order and declare that all persons held as slaves within said designated States, and parts of States, are, and henceforward shall be free; and that the Executive government of the United States, including the military and naval authorities thereof, will recognize and maintain the freedom of said persons. And I hereby enjoin upon the people so declared to be free to abstain from all violence, unless in necessary self-defence; and I recommend to them that, in all cases when allowed, they labor faithfully for reasonable wages. And I further declare and make known, that such persons of suitable condition, will be received into the armed service of the United States to garrison forts, positions, stations, and other places, and to man vessels of all sorts in said service. And upon this act, sincerely believed to be an act of justice, warranted by the Constitution, upon military necessity, I invoke the considerate judgment of mankind, and the gracious favor of Almighty God.

2016, DNC Address (July 2016)
Context: You know, nothing truly prepares you for the demands of the Oval Office. You can read about it. You can study it. But until you’ve sat at that desk, you don’t know what it’s like to manage a global crisis, or send young people to war. But Hillary has been in the room; she’s been part of those decisions. She knows what’s at stake in the decisions our government makes — what’s at stake for the working family, for the senior citizen, or the small business owner, for the soldier, for the veteran. And even in the midst of crisis, she listens to people, and she keeps her cool, and she treats everybody with respect. And no matter how daunting the odds, no matter how much people try to knock her down, she never, ever quits.
That is the Hillary I know. That’s the Hillary I’ve come to admire. And that’s why I can say with confidence there has never been a man or a woman — not me, not Bill, nobody — more qualified than Hillary Clinton to serve as president of the United States of America.

From the 2004 DNC

AP report with lead summarizing of remarks stating "Robert F. Kennedy said yesterday that the United States — despite Alabama violence — is moving so fast in race relations a Negro could be President in 40 years." "Negro President in 40 Years?" in Montreal Gazette (27 May 1961) http://news.google.com/newspapers?nid=1946&dat=19610527&id=y40tAAAAIBAJ&sjid=F50FAAAAIBAJ&pg=5424,5208719
Context: The Irish were not wanted there [when his grandfather came to Boston]. Now an Irish Catholic is president of the United States … There is no question about it. In the next 40 years a Negro can achieve the same position that my brother has. … We have tried to make progress and we are making progress … we are not going to accept the status quo. … The United States Government has taken steps to make sure that the constitution of the United States applies to all individuals.

1830s, Illinois House Journal (1837)