In the book “Kids These Days: Human Capital and the Making of Millennials,” Malcolm Harris laid out how millennials have come of age in an economy that requires a large accumulation of debt to earn a higher-education credential, to enter a job market concentrated in cities with high rent that is characterized by insecurity and low wages. These trends are even more pressing for younger Latinx voters, who have less family wealth to rely on than their white peers.

Mr. Sanders’s effective ground organization, led by the strategist Chuck Rocha, has taken a multimedia approach to engage with Latinx voters, including TV advertisements, digital media and mailers, along with canvassing. In Iowa, a state with a predominantly white population, the campaign sought the support of Latinx voters and those efforts paid off. Mr. Sanders won over 96 percent of their vote at four Spanish-language satellite caucus sites, earning crucial state delegates along the way that narrowed the close election. The victory was a product of effective organizing.

In Laredo, Texas, a city on the U.S.-Mexico border typical of places where Mr. Sanders has high support, I saw only two presidential campaigns on the ground — those of Michael Bloomberg and Mr. Sanders. While the Bloomberg campaign mostly relied on paid canvassers, the Sanders campaign held a community canvass of volunteers on the Saturday before Super Tuesday. In Laredo, Mr. Sanders won with 35 percent of the vote, while Mr. Bloomberg came in second. Mr. Sanders also carried El Paso, the Rio Grande Valley, San Antonio and Austin — all cities in Texas with large Latinx populations.

The Latinx electorate does not vote as a bloc, despite the hopes of marketers and political parties. National-origin, regional, age and class differences matter. The Latinx voters in California and Texas who back Mr. Sanders are mostly Mexican-American. His message will probably not translate in places like Florida, which has a significant Cuban and Venezuelan population.

But his campaign’s ability to rally Latinx voters is noteworthy. As I write in my book “Mobilizing the U.S. Latinx Vote,: Media, Identity, and Politics,” the center-left has viewed the Latinx vote as the key to an electoral majority and struggled to get it out to vote since at least 2000. Regardless of who the Democratic nominee will be, mobilizing these voters will be a key to victory in 2020. Democrats should avoid the flawed assumption that running against Mr. Trump will be enough to get them out. The Trump campaign is even making inroads among Latinx voters — especially evangelicals in states like Florida and Georgia.