Washington actually felt injured by slavery:"I wish you would inform him [Isaac] that I sustain injury enough by their idleness, they need not add to it by their carelessness."
"The improvement of the blacks in body and mind, in the first instance of their mixture with the whites, has been observed by every one, and proves that their inferiority is not the effect merely of their condition of life." Thomas Jefferson: Notes on Virginia Q.XIV, 1782. ME 2:197
"I will say then that I am not, nor ever have been in favor of bringing about in anyway the social and political equality of the white and black races - that I am not nor ever have been in favor of making voters or jurors of negroes, nor of qualifying them to hold office, nor to intermarry with white people; and I will say in addition to this that there is a physical difference between the white and black races which I believe will forever forbid the two races living together on terms of social and political equality. And inasmuch as they cannot so live, while they do remain together there must be the position of superior and inferior, and I as much as any other man am in favor of having the superior position assigned to the white race." Abraham Lincoln.
During his administration, Woodrow Wilson imposed full racial segregation in Washington D.C. and hounded from office considerable numbers of black federal employees.
When a delegation of blacks protested these actions, Wilson told them that “Segregation is not a humiliation but a benefit, and ought to be so regarded by you gentlemen.”
President Wilson’s words were used in the early film; The Birth of a Nation.
“The white men were roused by a mere instinct of self-preservation… until at last there sprung into existence a Great Ku Klux Klan a vertiable empire of the South, to protect the Southern country.”
"I think one man is just as good as another, so long as he’s not a nigger or a Chinaman.” Harry Truman (1911).
“Southern segregationists are not bad people. All they are concerned about is to see that their sweet little girls are not required to sit in school alongside some big overgrown Negro.” President Dwight D. Eisenhower to Chief Justice Earl Warren.
“My Story about the PT 109 collision is getting better all the time. Now I’ve got a Jew and a Nigger in the story and with me being a Catholic, that’s great.” John F. Kennedy
“I’ll have those niggers voting Democrat for the next 200 years.” -Lyndon Baines Johnson to two governors on Airforce One.
"I have the greatest affection for them [blacks], but I know they're not going to make it for 500 years. They aren't. You know it, too. The Mexicans are a different cup of tea. They have a heritage. At the present time they steal, they're dishonest, but they do have some concept of family life. They don't live like a bunch of dogs, which the Negroes do live like." Richard M. Nixon [From the Nixon White House Tapes].
But I think out of all the Presidents mentioned, Teddy Roosevelt actually got it right:
"The negroes were formerly held in slavery. This was a wrong which legislation could remedy, and which could not be remedied except by legislation. Accordingly they were set free by law. This having been done, many of their friends believed that in some way, by additional legislation, we could at once put them on an intellectual, social, and business equality with the whites. The effort has failed completely. In large sections of the country the negroes are not treated as they should be treated, and politically in particular the frauds upon them have been so gross and shameful as to awaken not merely indignation but bitter wrath; yet the best friends of the negro admit that his hope lies, not in legislation, but in the constant working of those often unseen forces of the national life which are greater than all legislation." - Theodore Roosevelt.