In an election that will likely come down to the smallest margins of victory, the consistent support for Trump from a small, but vocal, subset of Latino voters is a real threat to Democrats. If unchanged, this dynamic could have devastating repercussions for Latinos, and for the country as a whole.

The president’s treatment of immigrants at the border is inhumane and wildly unpopular with Latinos. And yet, his support among this voting bloc is not cratering. In fact, he enjoys more support from this electorate than Mitt Romney did in 2012, and about the same level that John McCain did in 2008.

Being able to provide for one’s family is one of the main reasons many people—from any country—immigrate to the United States, so the fact that Trump’s rhetoric on a growing economy has found an audience is not surprising. In Florida, for example, a poll by Equis Research showed that 57 percent of Latinos supported the way the president handled the economy. If you look at only Cuban voters from the state, that number jumps to 71 percent.

Another important point: Latinos are not one monolithic voting bloc. I was born in El Paso, Texas, and grew up in Tucson, Arizona, a son of Mexican American parents. My family’s political priorities are different from those of, say, Cuban American voters in Florida or Puerto Rican voters in New York.

Yet the ideological differences are even more stark across generations. As a third-generation Mexican American, I am right on the cusp of an intergenerational rift. Though I firmly identify with both my immigrant and American heritage, I am more American than Mexican. Identity is complicated, though. I have childhood friends who are Mexican American, whose families have lived in the U.S. for generations, who no longer identify with their Mexican heritage.

According to a Pew Research Center report, “The closer they are to their immigrant roots, the more likely Americans with Hispanic ancestry are to identify as Hispanic.” Complicating matters further, the report notes, “a long-standing high intermarriage rate and a decade of declining Latin American immigration … are distancing some Americans with Hispanic ancestry from the life experiences of earlier generations, reducing the likelihood they call themselves Latino.”

Read: Bernie Sanders’s biggest test yet with Latino voters

First- and second-generation American Latinos have strong ties to their immigrant heritage. However, the third generation only self-identifies as Latino 77 percent of the time. By the fourth generation or after, only half of U.S. adults with Latino ancestry say they are Latino.

These voters no longer align their cultural identity with immigrants, and immigration as an issue is less important to them. The vitriol the White House directs at immigrants does not move those who support Trump.