In her back pocket Ana Diaz carries a smooth grey pebble she calls her “knock knocker”. She uses it to get a loud rap on the front doors of the South Phoenix neighborhood where she is canvassing for the Democrats ahead of November’s crucial midterm elections.

It’s 110F (43C) in the early afternoon sun and Diaz is aiming to knock on 80 doors in this largely Latino neighborhood and speak to at least 20 people, encouraging them to vote. Diaz, a Los Angeles-based bartender and Unite Here union member, is a familiar face to many in this working-class area. In her T-shirt that reads WORKER POWER she has been knocking on these doors since 2018.

Voters are all talking about the economy. Diaz too worries about inflation, her grocery bill is so high she thinks she may have to stop buying beef. But, for her, the Democrats and good union jobs are the answer. “When we get together, we can make them change,” she said.

“Donald Trump called us ‘the crazies.’ Well we kicked him out,” she said as we walked the block, chugging water and looking for shade. Not many people were in. Diaz and her colleagues will be back. “We’re not going to stop,” she said.

Joe Biden narrowly won Arizona in the 2020 election, beating Trump with 49.4% of the vote to Trump’s 49.1%. As in neighboring Nevada, campaigners like Diaz who got out the Latino vote were crucial to that victory. It’s going to take every vote this time too for the Democrats to hold the state – where a crucial Senate seat is up for grabs and with it control of Congress.

But Democrats enter election season with two major handicaps: the incumbent party historically loses seats in the midterms and the economy – the top issue for voters – is a mess.

For the first time since 1980, when Ronald Reagan defeated Jimmy Carter in a landslide, inflation is a major electoral issue. For decades the specter of inflation had seemed vanquished – hovering around 2% in the US. Now the shadow of soaring prices hangs over everything. In Phoenix the inflation rate hit an annual rate of 13% in August, a record for any US city in data going back 20 years. The national average is 8.3%.

History tells us that the economy is usually the deciding factor in US elections. But whose economy? If there is one word that economists are using to describe the current state of the US economy, it is “weird”. Inflation is at a 40-year high and yet unemployment is at a 50-year low. There were more than 10m job openings in July in the US, over one and half jobs for every person currently looking for work. Interest rates are rising sharply, the once white-hot housing market looks like it could fall, loan rates are rising, and yet consumers are still spending.

Phoenix maps all the contradictory signals the economy is sending. The city’s long economic boom continues. About 200 new residents have moved there every day in recent years, attracted by a lower cost of living and by businesses moving for less regulation and lower taxes. It’s not enough. The construction industry alone needs to add 265,000 qualified workers. Healthcare, financial services, all are struggling to fill vacancies.

That pressure cooker environment has led to soaring rents in the city – up 46% over the year – but still lower than many other US cities. The situation is particularly hard for lower wage workers and long-term residents now competing with more moneyed migrants from nearby California and elsewhere. For many, wages are failing to keep up with the cost of living crisis as inflation pushes up the price of everything from gas and food to construction costs.

“As cross currents buffet the Arizona economy, it looks different depending on the lens used to view it,” University of Arizona professor George Hammond wrote in his latest report on the state of the state. Hammond is expecting slower growth in 2022 and 2023, which could help with costs but also cost people their jobs. Over the long term, he expects Arizona’s economy will still outpace the rest of the country.

Diaz believes the Democrats are best placed to navigate these strange seas. “People are like ‘I really don’t care who gets in.’ But you should. Your streets need cleaning, you have no lights, your alleys are full of trash, we have a problem with homelessness. If we don’t choose the right people to snake these changes, it’s not going to happen,” she says.

In Scottsdale, Phoenix’s affluent neighbor that is rapidly being absorbed by Phoenix’s sprawl, others have different views. “Biden is a nut,” says Jim Baumann, 60, shopping in Whole Food in his orange Harley Davidson T-shirt. “He screwed this up.” The retiree’s grocery bill now averages $300 to $350 a month he says, up from $200 before inflation bit. “I didn’t like Trump’s mouth but he was better than Biden.”

Like so many other issues in the US, views on the economy are fractured, filtered by political and personal views and not always in line with today’s party doctrine.

Immigration is a major issue for Republicans, and one that has big economic consequences in the area. Kari Lake, the Trump-backed candidate for governor, has said the Central American migrants now entering the US “could be terrorists, they could be murderers and they are most likely hardcore criminals”. Blake Masters, running for Senate, has accused Democrats of being pro-immigration to “change the demographics of our country”. Privately some local, Republican-leaning, business leaders are embarrassed by the rhetoric and see immigration reform as essential to solving their worker shortages. At the same time Latino voters are not a monolithic bloc and shifted slightly right in 2020, a factor that could decide the race this time.

Then there is abortion. Few decisions have greater economic consequences than the decision whether or not to have a child. In recent elections Republicans have paid the price for the supreme court’s decision to end the constitutional protection of abortion even in deep red states like Kansas. Last month an Arizona judge revived a highly restrictive law, that dates back to 1864, banning almost all abortions. Polls show the majority of Arizonans (Republicans and independents included) are in favor of keeping abortion legal in the state in most cases.

All this complexity is exacerbated by the weirding of the economy. “Strange would be an understatement,” said Greg Ayres, president of Corbins and chief operating officer of Nox Group, construction companies that specialise in water and waste management, data centers and work for the semi conductor industry.

Prices have soared for the construction industry, talent is in short supply, wages are rising and pandemic-related supply chain issues are still rippling through and causing delays. “Everything is so volatile,” he said. “Almost every project is over budget.” And yet business is good. His biggest immediate issue is finding enough people for all the projects he has on the go.

The company employs 750 people at present, up from 650 before the pandemic. He wouldd like to be at 1,000 within the year. “But it’s really competitive,” Ayres said.

To attract workers Corbin has upped its training programs, benefits and wages. Across the street from his office is a cavernous gym, recreation and health center with a full-time trainer on staff, added to attract and retain talent. Salaries are rising too. With overtime, Ayres said, a mid-twenties journeyman could make over $104,000 a year. The company will train up as many competent workers as it can get its hands on, he says.

It’s the same story across the Valley of the Sun, said Todd Sanders, president of business lobby group the Greater Phoenix Chamber in 2009. “It’s almost like we are defying the laws of physics,” he said. The area is suffering from high inflation like the rest of the county but companies are still moving there in large numbers, he said. “By and large we are seeing an economy that is still very strong. It’s an interesting time.”

For some low-wage workers buffeted by these economic riptides “interesting” doesn’t even begin to describe it.

People know Jarvis Johnson in Phoenix. He went viral for his high-octane audition on reality show So You Think You Can Dance and again for his dedication to Black Friday bargain shopping. His friends describe him as a “ball of energy” and an “eternal optimist”. But when I caught up with him between jobs he seemed tired. It’s not surprising.

Johnson, 32, has been working three jobs in order to support his wife and his three young children. His day starts at 3.30am at a Covid testing center, at 11am he starts his shift at a senior living center. Often he isn’t home before at 8pm. He also puts in shifts at a local gas station and is hoping to increase his hours there now that the Covid work is tapering off.

All of the jobs pay better than Arizona’s minimum wage of $12,80 an hour. The testing job paid $25 an hour during the worst of the pandemic and at one point Johnson was working there 40 hours a week. But even then, his wages were barely keeping up with the cost of living.

Two years ago when he moved into his apartment, he was paying $960 a month in rent. Now it’s close to $1,500. Gas prices have fallen in Arizona, as they have across the US, but are still about $4.90 a gallon, up from just over $3 a year ago. The couple have two cars and it costs $160 to fill them. Food is more expensive. His wife could go to work but daycare costs would wipe out her wages. “It’s crazy. Everything has got more expensive,” he said.

“It’s hard. It’s hard right now. I’m just trying to keep my head up and not let my kids see I’m struggling,” he said. “I have to work my butt off to make it. I’m getting by but it’s still not enough.”

Biden has promised a fairer, more equitable economy. His administration passed the Inflation Reduction Act which will increase taxes on the US’s largest companies and cut prescription drug prices. He’s also pouring money into solar energy and silicon chip production – both of which will benefit Arizonans. But will it be enough to persuade voters he really has a plan to steer them through this strange economic landscape?

Johnson says he will vote Democrat but he doesn’t believe either party has the solution. “They can’t do nothing for me, these employers, they need to pay their people,” he says. “People are struggling.”

He wants to start his own business, a hot dog food truck. “I think I’d make more money working for myself, to be honest,” he said. At the moment he has about $1,000 saved but it’s not enough and he’s worried that an incident, a broken car or worse, could wipe out his savings. “Anything can happen,” he said.