I believe we are. So does Heather Cox Richardson:

That decision [man born in America, to Chinese-born parents, is a US citizen — U.S. v. Wong Kim Ark 1898] has stood ever since, as a majority of Americans have recognized the principle behind the citizenship clause as the one central to the United States: “that all men are created equal” and that a nation based on that idea draws strength from all of its people.

On the last day of his presidency, in his last speech, President Ronald Reagan recalled what someone had once written to him: “You can go to live in France, but you cannot become a Frenchman. You can go to live in Germany or Turkey or Japan, but you cannot become a German, a Turk, or a Japanese. But anyone, from any corner of the Earth, can come to live in America and become an American.”

He continued: “We lead the world because, unique among nations, we draw our people—our strength—from every country and every corner of the world. And by doing so we continuously renew and enrich our nation. While other countries cling to the stale past, here in America we breathe life into dreams. We create the future, and the world follows us into tomorrow. Thanks to each wave of new arrivals to this land of opportunity, we’re a nation forever young, forever bursting with energy and new ideas, and always on the cutting edge, always leading the world to the next frontier. This quality is vital to our future as a nation. If we ever closed the door to new Americans, our leadership in the world would soon be lost.”

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