As its immigration crackdown in Minneapolis intensifies, the Trump administration is leaning into messaging that borrows from phrases, images and music about national identity that have become popular among right-wing groups. On Jan. 9, two days after a U.S. Immigration and Customs Enforcement agent’s shooting of Renee Good sent tensions in Minneapolis to a fever pitch, the Department of Homeland Security posted to social media an image of a man on a horse riding through a snowy, mountainous landscape with the words “We’ll have our home again.” That’s the chorus to a song about ousting a foreign presence by a...