„The foreign-born population of this country must be an Americanized population. No other kind can fight the battles of America either in war or peace. It must talk the language of its native-born fellow-citizens; it must possess American citizenship and American ideals. It must stand firm by its oath of allegiance in word and deed and must show that in very fact it has renounced allegiance to every prince, potentate, or foreign government. It must be maintained on an American standard of living so as to prevent labor disturbances in important plants and at critical times. None of these objects can be secured as long as we have immigrant colonies, ghettos, and immigrant sections, and above all they cannot be assured so long as we consider the immigrant only as an industrial asset. The immigrant must not be allowed to drift or to be put at the mercy of the exploiter. Our object is not to imitate one of the older racial types, but to maintain a new American type and then to secure loyalty to this type. We cannot secure such loyalty unless we make this a country where men shall feel that they have justice and also where they shall feel that they are required to perform the duties imposed upon them.“

— Theodore Roosevelt

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„The American people should itself do these things for the immigrants. If we leave the immigrant to be helped by representatives of foreign governments, by foreign societies, by a press and institutions conducted in a foreign language and in the interest of foreign governments, and if we permit the immigrants to exist as alien groups, each group sundered from the rest of the citizens of the country, we shall store up for ourselves bitter trouble in the future.“
— Theodore Roosevelt
„When in 1909 our battlefleet returned from its voyage around the world, Admirals Wainwright and Schroeder represented the best traditions and the most effective action in our navy; one was of old American blood and of English descent; the other was the son of German immigrants. But one was not a native-American and the other a German-American. Each was an American pure and simple. Each bore allegiance only to the flag of the United States. Each would have been incapable of considering the interests of Germany or of England or of any other country except the United States.“
— Theodore Roosevelt
„My fellow Americans, we are and always will be a nation of immigrants. We were strangers once, too. And whether our forebears were strangers who crossed the Atlantic, or the Pacific, or the Rio Grande, we are here only because this country welcomed them in, and taught them that to be an American is about something more than what we look like, or what our last names are, or how we worship. What makes us Americans is our shared commitment to an ideal -– that all of us are created equal, and all of us have the chance to make of our lives what we will. That’s the country our parents and grandparents and generations before them built for us. That’s the tradition we must uphold. That’s the legacy we must leave for those who are yet to come.“
— Barack Obama
„If he tries to keep segregated with men of his own origin and separated from the rest of America, then he isn't doing his part as an American. There can be no divided allegiance here. Any man who says he is an American, but something else also, isn't an American at all. We have room for but one flag, the American flag, and this excludes the red flag, which symbolizes all wars against liberty and civilization, just as much as it excludes any foreign flag of a nation to which we are hostile. We have room for but one language here, and that is the English language, for we intend to see that the crucible turns our people out as Americans, of American nationality, and not as dwellers in a polyglot boarding-house; and we have room for but one soul loyalty, and that is loyalty to the American people.“
— Theodore Roosevelt
„How can we escape from the trap that the terrorists have set us? Only by recognizing that the war on terrorism cannot be won by waging war. We must, of course, protect our security; but we must also correct the grievances on which terrorism feeds. Crime requires police work, not military action.“
— George Soros