“But for all those who scratched and clawed their way to get a piece of the American Dream, there were many who didn't make it - those who were ultimately defeated, in one way or another, by discrimination. That legacy of defeat was passed on to future generations - those young men and increasingly young women who we see standing on street corners or languishing in our prisons, without hope or prospects for the future. Even for those blacks who did make it, questions of race, and racism, continue to define their world-view in fundamental ways. For the men and women of Reverend Wright’s generation, the memories of humiliation and doubt and fear have not gone away; nor has the anger and the bitterness of those years.
That anger may not get expressed in public, in front of white co-workers or white friends. But it does find voice in the barbershop, or the beauty shop, or around the kitchen table. At times, that anger is exploited by politicians, to gin up votes along racial lines, or to make up for a politician's own failing. And occasionally it finds voice in the church on Sunday morning, in the pulpit and in the pews. The fact that so many people are surprised to hear that anger in some of Reverend Wright's sermons simply reminds us of the old truism that the most segregated hour of American life occurs on Sunday morning.”

Speech to the South Carolina Legislature, Columbia, SC (16 April 1947); Baruch said that the phrase "cold war" was suggested to him by H. B. Swope, editor of the New York World; the term had earlier been used by George Orwell (1945)
Context: Let us not be deceived — we are today in the midst of a cold war. Our enemies are to be found abroad and at home. Let us never forget this: Our unrest is the heart of their success. The peace of the world is the hope and the goal of our political system; it is the despair and defeat of those who stand against us.

Mauricio ('The Eye') Silva
Last Evenings on Earth (2006)

2010s, Farewell Speech (2017)
Context: If your family doesn't have much money, I want you to remember that in this country, plenty of folks, including me and my husband — we started out with very little. But with a lot of hard work and a good education, anything is possible — even becoming President. That's what the American Dream is all about.
If you are a person of faith, know that religious diversity is a great American tradition, too. In fact, that's why people first came to this country — to worship freely. And whether you are Muslim, Christian, Jewish, Hindu, Sikh — these religions are teaching our young people about justice, and compassion, and honesty. So I want our young people to continue to learn and practice those values with pride. You see, our glorious diversity — our diversities of faiths and colors and creeds — that is not a threat to who we are, it makes us who we are.

"The End and the Beginning"
Poems New and Collected (1998), The End and the Beginning (1993)
Context: Those who knew
what this was all about
must make way for those
who know little.
And less than that.
And at last nothing less than nothing.

Ronald Reagan: "Remarks at the National Conference of the National Federation of Independent Business ," June 22, 1983. Online by Gerhard Peters and John T. Woolley, The American Presidency Project http://www.presidency.ucsb.edu/ws/?pid=41504
1980s, First term of office (1981–1985)

Manuscript Found in Accra (2012), The Defeated Ones

Often attributed to Eleanor Roosevelt without an original source in her writings, for example in the introduction to It Seems to Me : Selected Letters of Eleanor Roosevelt (2001) by Leonard C. Schlup and Donald W. Whisenhunt, p. 2 http://books.google.com/books?id=UeFWjTMcLZYC&lpg=PP1&pg=PA2#v=onepage&q&f=false. But archivists have not been able to find the quote in any of her writings, see the comment from Ralph Keyes in The Quote Verifier above.
Disputed