No president in the history of the Republic has used the word “America” as effectively as Donald Trump — not as a symbol to invoke unity but as kerosene to keep the home fires of our culture wars burning.

America, America: Make it great. It already is great. Keep it great. America must. America will. America First. “America,” said Stephen Miller, Mr. Trump’s deputy chief of staff and the driver of much of his nativist domestic policy, “is for Americans and Americans only.”

But what does it mean to be an American if armed, masked men can sweep anybody, citizen or not, off the street, forcing people into unmarked S.U.V.s — to be, if Mr. Trump has his way, disappeared to remote Louisiana or taken to a prison camp in El Salvador?

Mr. Trump and operatives like Mr. Miller are waging a war not only on migrants but also on the concept of citizenship. According to one report, Immigration and Customs Enforcement expelled as many as 66 citizens during Mr. Trump’s first term, and now he has issued an executive order ending birthright citizenship. His government is exiling children who were born in the United States, including a 4-year-old boy with late-stage cancer. The Justice Department says it is “prioritizing denaturalization,” establishing a framework to revoke citizenship from naturalized citizens the White House deems undesirable.

Vice President JD Vance admits the expansion of ICE is the mainspring of the White House’s agenda. In a series of social media posts, he pushed back against worries about the president’s signature reconciliation bill. Nothing else in the bill mattered, he said — not debt, not Medicaid cuts — compared to securing “ICE money.” Now, the agency — which already acts like a secret police — will have an additional $75 billion to build detention centers, hire new agents and supercharge its operations.

Mr. Trump’s war on citizenship goes hand in hand with his politicization of the name of America, and though the first is unprecedented in its intensity, the second taps into a long, well, American tradition, one as old as the nation itself.