Elizabeth Warren speaks at her campaign for the Democratic nomination for the 2020 United States presidential election

"The country's economic foundation is fragile. A single shock could bring it all down. And the Trump Administration's reckless behavior is increasing the odds of just such a shock," Warren wrote.

She also noted weakness in the manufacturing sector, putting the blame for its recent slowdown on President Donald Trump, who has tangled with China over trade. Despite Trump's pledge to bring back manufacturing jobs, the sector is now in recession, she wrote, and wages for the industry lag the national average.

The Massachusetts Democrat said that increasing household and corporate debt has left the economy on precarious footing. Citing a top economist , Warren wrote that a failure to raise the debt ceiling in September could be "more catastrophic" than the 2008 collapse of Lehman Brothers.

"Warning lights are flashing. Whether it's this year or next year, the odds of another economic downturn are high — and growing," Warren wrote in a post on the blogging platform Medium.

Democratic presidential contender Sen. Elizabeth Warren warned on Monday that the next financial crisis is on its way.

The post is written in the meticulous and citation-heavy style that Warren's campaign has adopted in its prolific policy roll-outs. The first sentence links to an article written by the fact-checking website PolitiFact, which found in April that Warren's claim that she predicted the 2008 financial crisis before it happened is truthful.

Trump has boasted of the strength of the economy as part of his own reelection bid. Since he was elected, the stock market has soared — the S&P 500 index of the largest American companies has risen nearly 40% — and unemployment has sunk to its lowest rate in decades. Real wages have also risen.

But growth is expected to slow. On Friday, the release of second-quarter GDP data is expected to show the economy growing at a relatively sluggish 1.8%, according to an estimate from Dow Jones, compared with 3.1% in the first quarter.

Warren, a bankruptcy law expert who was an influential professor at Harvard Law School before running for the Senate, is a longtime consumer advocate.

Despite her bleak prognosis, she wrote that the "good news is that we have the chance to head off a crisis — just like we had a chance to head off the 2008 crisis — if we take bold action now to address the underlying problems" in the economy.

She said the government should cut household debt by canceling up to $50,000 in student loan debt for most families, raise the minimum wage to $15 an hour and strengthen the power of unions. She also said the Financial Stability Oversight Council must meet "specifically to discuss these risks and announce a plan for addressing them."

Warren wrote that Congress should "take the prospect of breaching the debt ceiling off the table forever" by eliminating it or raising the ceiling to allow for new spending when authorized by Congress.

And she touted her Green Manufacturing Plan, announced last month, which includes $2 trillion in investments over the next decade in research, manufacturing, and exporting related to green technology.

"Congress and regulators should act immediately to tamp down these threats before it's too late," she wrote.