Ruben Gallego, a Democrat, first won elected office in Arizona in 2010, a time of fierce battles over immigration. That year, Republicans passed SB1070, known as the “show me your papers” law, which required state police to ask individuals they suspected of being undocumented to provide proof of their status. Joe Arpaio, the publicity-minded sheriff in Arizona’s most populous county, recruited right-leaning Hollywood actors to a “posse” he formed to track down illegal migrants. Although the Supreme Court struck down most of SB1070’s provisions and voters ousted Mr Arpaio in 2016, “those scars aren’t going away,” says Mr Gallego, now a congressman running for an open Senate seat. He says the legacy of Latino activism from the Arpaio era may explain why, in 2020, Arizona Latinos voted for Joe Biden in higher numbers than Latinos nationally did, helping to deliver Mr Biden a narrow 10,000-vote victory in the state.

The Latino electorate is growing unusually fast and a majority still prefers Democrats. Of the six swing states likely to decide the presidential election in November (the other five being Georgia, Michigan, Nevada, Pennsylvania and Wisconsin), Arizona has the largest share of Latino voters. Mr Trump is clearly gaining popularity among Hispanics. However, current polling suggests that Latino voters still prefer Democrats overall, just by a smaller margin than in the past—meaning that it is Mr Biden who will benefit from the growth in Latino voters. The outcome in Arizona will depend largely on the race between these two trends.

Hispanic population in Arizona, % of total

Sources: Pew Research Centre; US Census

The Arizona contest reflects fluidity in the national Latino vote. The group has never constituted a political monolith. It includes both Florida’s right-leaning refugees from Cuba’s socialist dictatorship and California’s proud leftist heirs to Chicano activism. Yet because, on average, Latino voters came to America more recently than non-Hispanic white and black Americans, they are less likely to have inherited a strong party affiliation from their parents or grandparents. They also “are more likely to hold what political scientists call cross-cutting identities”, or traits more commonly found among people outside one’s political tribe, says Samara Klar, a political scientist at the University of Arizona in Tucson. An evangelical Democrat might sound like an oxymoron but half of evangelical Latinos say the Democratic Party represents their interests. Because of cross-cutting identities, “Latino voters know a lot more people from the other party and they’re less hostile” towards them, notes Dr Klar.

Latinos also tend to have less extreme views. Compared with white Americans, they are less likely to identify as very conservative or very liberal. In a recent YouGov/The Economist poll one in seven said they do not know where they fall on the political spectrum, three times the number of white Americans who said the same.

Given these attributes, it should be little surprise that although Latinos as a whole lean Democratic, millions have voted for Republican candidates. Exit polls suggest that as far back as 1984 Ronald Reagan won some 37% of the Latino vote. By 2004 George W. Bush’s approximate 40% share was a high-water mark that even Mr Trump has yet to achieve.

Arizona, Hispanics as % of population

By census tract, 2021

Share of total votes cast by Hispanic voters, 2020, %

Arizona, Hispanics as % of population

By census tract, 2021

Share of total votes cast Hispanic voters, 2020, %

Arizona, Hispanics as % of population

By census tract, 2021

Share of total votes cast

by Hispanic voters, 2020, %

Democrats have assumed at their peril that Latinos are a natural constituency and share many of the party’s (increasingly) progressive preferences. “Latinos are not the black vote and Democrats just don’t understand that,” says Mike Madrid, a veteran Republican strategist. Yet Republicans have at times fallen into the same trap, assuming that Latinos leaned so Democratic that courting them was futile. “There were no Latino organisers in the Republican Party for 30 years,” adds Mr Madrid.

That has changed. In 2020 Republicans made gains with Latinos across the board. Voter profiles from Catalist, a political-data firm that helps Democrats, show that although Democrats won Latinos outright, Republicans increased their vote share among all subgroups of Latino voters. Their strides were especially large with non-college-educated Latinos. They swung 11 percentage points to the right between 2016 and 2020. Republicans also gained six points among college-educated Latinos. And while Mr Trump did not generally make notable gains among young voters between 2016 and 2020, young Latinos lurched to the right. Mr Trump’s share of votes from 18- to 29-year-old Latinos increased from 21% to 31%.

Some of this Republican momentum might be a reversion to the mean. Latino support for Barack Obama, the first minority nominee, and Hillary Clinton, the first female one, may have been unusually strong. Without Mrs Clinton to inspire them, Latinas swung towards Mr Trump by 12 percentage points in 2020. But why else did Republican gains materialise in such a pronounced way in 2020?

Covid may have been a factor. The disease disproportionately killed Latinos and strained their incomes. Some 24% of Latinos were employed as low-income front-line workers, more than any other race or ethnicity. About one in four new businesses are Hispanic-owned. So although Democrats’ focus on lockdowns and containing the disease may have saved many Latinos’ lives, it was perceived as threatening their livelihoods. Meanwhile, Mr Trump and Republican governors across the country advocated for fewer restrictions and a swift return to normal. According to a report by Equis Research, an outfit that studies Latino political behaviour, “Latino voters saw the 2020 election as a referendum on the economy…in a way they hadn’t in 2016.”

About 85% of Arizona’s Latino voters trace their origins to Mexico, a cohort whose views typically track Latino national averages. Yet whereas Democrats’ lead over Republicans among Latinos shrank by 16 points nationally in 2020, in Arizona their lead narrowed by only 9.6 points. Had Mr Trump performed among Arizona Latinos as he did nationally he would have won the state. His prospects have improved since then. Even after accounting for Democrats’ strength in Arizona, current polling suggests Mr Biden’s chances of winning the state in November are on a knife’s edge.

Holding constant the advantage Democrats had among Latinos in Arizona in 2020, Mr Biden is currently up by 17 percentage points among Latinos in the state, an 8.4-point shift to the right. An equivalent erosion in support would have cost Mr Biden 50,000 votes in 2020, enough for him to lose the state. Yet Republicans appear poorly positioned to seize upon their gains as the 2024 general-election campaign gets under way. Four years ago the Republican National Committee (RNC) invested early and heavily to win over Latino voters. This year the RNC is starved for cash. It has just $8m on hand compared with $77m at this point in 2020. And the Arizona Republican Party has been hobbled by dysfunction and factional disputes. All this bodes ill because campaign pros say the formula for winning an election that requires a surge in turnout is simple: spend money and reach out to voters early and often.

Mr Biden could still win the White House while losing Arizona. Assuming that the forecasts of a tight race prove accurate, and that Mr Biden holds on to Pennsylvania and Michigan, which are his strongest prospects among the half-dozen swing states, he would need to win at least one more of them. But Mr Biden’s loosening grip on the Latino vote— which is a significant factor in other closely contested states, particularly Nevada—is hardly encouraging.

Democrats are betting that the electoral maths will continue to favour them in Arizona because the Latino electorate will continue to grow. (They also expect Mr Biden’s standing with voters to improve by November.) The number of Latinos voting in Arizona has in fact increased steadily over the past two decades. This year alone there will be 150,000 newly eligible Latino voters in the state. And Arizona Latinos seem particularly motivated. In 2020 a striking 67% of eligible Latino voters in Arizona went to the polls, compared with 54% nationally (which was the lowest of all major racial and ethnic groups). If Latino turnout again reaches 67% in November, that would mean that Democrats could lose nearly four points from their Arizona margins over Republicans in 2020 and still net just as many votes.

“Who do you think would do a better job

handling the following issues as president?”

Source: YouGov/The Economist

“Who do you think would do a better job handling the

following issues as president?”, United States, %

“Who do you think would do a better job handling the

following issues as president?”, United States, %

Economic issues may also hurt Mr Biden. Until 2019 housing in the Phoenix metropolitan area, where two-thirds of the state’s population lives, was cheaper than the nationwide average. Residents there now shell out 12% more than average. Inflation also spiked higher in Phoenix during 2022 than in any other city, although it has since fallen below the national average. In November 2023 some 59% of Latinos in the state said inflation was one of their most pressing concerns. That cannot be helping Mr Biden’s standing.

Political campaigns come and go, but Democrats’ outreach to Latinos is maintained during off-cycle years with a vast network of grassroots Latino organisations that hew progressive. “This does not exist on the Republican side of the equation,” laments Helder Toste, a former field director at the Republican National Senatorial Committee.

These dynamics will affect more than just the presidential ticket. They may well help decide which party controls the House and the Senate. Mr Gallego, who currently represents parts of Phoenix in the House of Representatives, will probably do battle with Kari Lake, a Trump acolyte and election-denier, for Kyrsten Sinema’s open Senate seat. The state also has two competitive House races. One features an incumbent and rising star, Juan Ciscomani, a Mexican-born Republican who gave the party’s Spanish-language response to Joe Biden’s state-of-the-union speech in 2023.

The election is still more than seven months away and many Latino voters have not tuned in yet. According to polling from YouGov/The Economist, 38% of Hispanic respondents, compared with 23% of white respondents, say they are paying little or no attention to the 2024 presidential campaigns. In the autumn, when more Latino voters take note, they are likely to be bombarded with messages that the fate of the nation lies in their hands. In Arizona at least, the adverts will not be all exaggeration. ■

Sources: YouGov; Catalist; Redistricting Data Hub; US Census Bureau; OpenStreetMap; Pew Research Centre; Federal Election Commission; All About Redistricting; ArcGIS; The Economist