Read the passage and then answer the question.

“In the first place, we should insist that if the immigrant who comes here in good faith becomes an American…But this is predicated upon the person's becoming in every facet an American, and nothing but 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... We have room for but one language here, and that is the English language... and we have room for but one sole loyalty and that is a loyalty to the American people.”
― Theodore Roosevelt

What is Roosevelt talking about in this passage?

Roosevelt is discussing the importance of immigrants fully embracing American identity and culture, including learning English and being loyal only to the United States. He emphasizes the need for immigrants to prioritize their allegiance to America above all else.