The United States added far fewer jobs than expected in August as businesses grappled with the Delta wave of Covid-19, a major disappointment and yet another complication for President Joe Biden's plans to remake the world's largest economy.

Employment rose by just 235,000 jobs last month, according to Labor Department data released Friday, and while the unemployment rate fell to a pandemic low of 5.2 percent, the report was nowhere near the job gains seen in recent months, which have topped one million.

In some ways, the lackluster hiring told a familiar tale, with the world's largest Covid-19 outbreak once again hurting the labor market and underscoring that it is unlikely to make much improvement if infections remain high.

Biden, who is negotiating passage of two massive spending bills through a Congress where even his ostensible allies have shown a willingness to defy him, said he had pulled the country from "economic free fall." 

"What we're seeing is an economic recovery that is durable and strong," he said in a speech from the White House.

But he acknowledged the job numbers fell short of expectations and added a somber message: "We have a lot more work to do."

The president is urging Congress to enact both a $1.2 trillion infrastructure overhaul and a $3.5 trillion social welfare package. But on Thursday a moderate senator urged fellow Democrats to delay voting on the latter bill, which cannot pass without his support.

The Federal Reserve is also paying close attention to the data, as it could impact when it begins slowing its massive purchases of bonds meant to help the economy weather the pandemic. 

Chair Jerome Powell has signaled that could start by year's end.

- No good news -
The August payroll increase was sharply lower than the upwardly revised 1.1 million positions added in July, and considerably below the 750,000 new jobs expected by analysts.

The weak hiring comes as states and businesses impose mask-wearing requirements and other restrictions to fend off the fast-spreading Delta variant.

Covid-19 vaccines have allowed for strong rehiring in recent months after more than 20 million people lost their jobs when the pandemic began last year, but as of August 5.3 million positions still haven't been recovered, according to the Labor Department report.

The leisure and hospitality sector, which bore the brunt of the pandemic's initial layoffs, had added an average of 350,000 jobs per-month over the last six months, but in August it added zero positions, the data said.

There was no improvement either in the labor force participation rate indicating the share of people employed or looking for work, which was at 61.7 percent in August, around the range it has hovered at for more than a year.

Adult men and white Americans saw their unemployment rates decline, but joblessness remained widespread for others, including Hispanics, for whom unemployment was 6.4 percent, and Black Americans, which saw a 0.6 percent jump to 8.8 percent unemployment.

The number of people reporting they could not work because their employer lost business or closed due to the virus rose to 5.6 million from 5.2 million in July. 

"September likely will be weak too, and we're becoming nervous about the prospects for a decent revival in October, given that behavior lags cases, and cases are yet to peak," Ian Shepherdson of Pantheon Macroeconomics said.

- Big wage jump -
In an interview with CNBC, National Economic Council Director Brian Deese said, "even with the headwinds of Delta... we have an economy that's able to continue generating durable job growth," pointing to employment gains since Biden took office in January.

Industries that did add jobs last month include professional and business services, which rose by 74,000, transportation and warehousing, which gained 53,000, and private education, which added 40,000, though state government education and local government education saw declines.

A positive surprise was seen in wages, where average hourly earnings rose 0.6 percent to $30.73 after four straight months of increases.