BALTIMORE — When Joe Biden entered the White House as vice president, the economy was cratering. Job losses were mounting. Stocks were crashing. Millions of Americans were in the early stages of losing their homes to foreclosure as the housing bubble burst.

Biden returns to the White House as president a dozen years later with the economy battered and shaken by a pandemic. But this time is different — and it could reset the nation’s politics if Biden and Democrats can count on a level of growth not seen in a generation.

Despite the 9.8 million jobs lost due to the coronavirus, there are signs the country is on the cusp of a kind of boom unseen in the Obama and Trump eras.

Checking account balances have surged by $2.4 trillion since the outbreak began. Home prices are soaring because of hot demand. And each additional vaccination moves the world’s largest economy closer to fully re-opening.

“If the economy is improving substantially by spring or early summer, that might actually help Biden get more of his agenda done … because success can beget success,” said Jason Furman, who was top economist for the Obama administration. He pointed to the possibility of growth easing the path for an infrastructure program and climate investments.

But hanging over any effort to boost the economy is an enduring partisan divide that contributed to the deadly assault on the U.S. Capitol this month as Biden’s Electoral College victory was set to be certified. Politics is increasingly shaping how Americans feel about the economy, scrambling the political incentives for lawmakers to cooperate.

There also are concerns about whether the worsening pandemic and slow pace of vaccinations thus far could portend more serious problems on the coronavirus front that could hurt the economic recovery.

The potential for a boom reflects in large part the roughly $4 trillion approved so far in federal aid, with Biden last week proposing $1.9 trillion more, an unprecedented level of stimulus. The additional money, which must be approved by Congress, is intended to accelerate the vaccine rollout, reopen schools and reduce the child poverty rate to a historic low.

The investment bank Goldman Sachs estimates that growth this year could be 6.6 percent if part of Biden’s stimulus plan passes. That would be the strongest gain since 1984, when a 7.2 percent increase in the gross domestic product helped carry Republican President Ronald Reagan to a second term in a landslide. Wells Fargo forecasts growth of 4.6 percent this year, which would be the best since 1999.

Still, there are plenty of economic risks facing Biden. The most bullish forecasts hinge on getting much of Biden’s aid package through Congress. And any gains would probably depend on overcoming the pandemic. There is also the possibility that the added stimulus championed by Biden could be more than the economy needs, perhaps stirring inflation.

But the Great Recession taught Biden’s team the benefit of going big with stimulus. Incoming White House Chief of Staff Ron Klain says Biden’s officials learned the hard way that the roughly $800 billion approved in 2009 to fight the Great Recession was insufficient, a mistake they’re unwilling to repeat this time.

“It wasn’t large enough,” Klain said Friday at a livestreamed Washington Post event. “Our recovery lagged as a result.”

During the first nine months of the Obama presidency, the unemployment rate climbed to 10 percent and the swift recovery that was predicted never happened as the country took years to work through housing foreclosures and rebuild its financial system.

This left Obama administration officials having to argue that the economy would have been even worse without the stimulus. Republicans countered that the effort had flopped as they won control of the House in the 2010 midterm elections.

“There isn’t much doubt that the economy did better in 2009 and 2010 because of the recovery act,” said Douglas Elmendorf, who was director of the Congressional Budget Office at the time and now serves as dean of Harvard University’s Kennedy School. “Too many people took the failure to hit (stronger growth) as a sign that the stimulus didn’t work, when, in fact, the economy was worse off than widely understood.”

Biden can count on backing from Wall Street investors this time to borrow. Helped by supportive Federal Reserve policies, low interest rates make it easier to keep financing a stimulus and repay added debt.