Democratic bed-wetting over the 2020 primary has reached a previously unseen level.

Fear that the party doesn’t have the candidate to win is an evergreen aspect of the modern presidential race. In just about every presidential contest in recent memory, there have been moments of existential fear among Democrats.

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But the worry this time, when the party will nominate a candidate to take on President Trump Donald John TrumpFederal prosecutor speaks out, says Barr 'has brought shame' on Justice Dept. Former Pence aide: White House staffers discussed Trump refusing to leave office Progressive group buys domain name of Trump's No. 1 Supreme Court pick MORE in an effort to end his time in office at one term, are like nothing seen before, say Democrats.

“This is like the Democratic bed-wetting of past cycles except everyone evidently drank a gallon of chardonnay before they went to bed,” said Democratic strategist Eddie Vale.

He said Democrats are pulling out their hair like never before because they want to learn lessons from Trump’s 2016 victory, and a fair number of big party donors are not “the best gauges of how the public will see things versus the people in their own social circles.”

The New York Times crystalized the fears in a story earlier this week about “anxious” Democratic donors wondering if the party would be better served with a new candidate, such as 2016 nominee Hillary Clinton Hillary Diane Rodham ClintonBloomberg rolls out M ad buy to boost Biden in Florida Hillicon Valley: Productivity, fatigue, cybersecurity emerge as top concerns amid pandemic | Facebook critics launch alternative oversight board | Google to temporarily bar election ads after polls close Trump pledges to make Juneteenth a federal holiday, designate KKK a terrorist group in pitch to Black voters MORE or former New York City Mayor Michael Bloomberg Michael BloombergBloomberg rolls out M ad buy to boost Biden in Florida Democratic groups using Bloomberg money to launch M in Spanish language ads in Florida Bloomberg pays fines for 32,000 felons in Florida so they can vote MORE.

“You can count on the sun rising, an ironic Trump tweet from 2012, and Democratic bed-wetting over our field of presidential candidates,” said Democratic strategist Christy Setzer. “But the fears this year are greater because the stakes have never seemed so high.”

Democrats are worried that former Vice President Joe Biden Joe BidenFormer Pence aide: White House staffers discussed Trump refusing to leave office Progressive group buys domain name of Trump's No. 1 Supreme Court pick Bloomberg rolls out M ad buy to boost Biden in Florida MORE is a weak candidate whose age is showing. They fear Sen. Elizabeth Warren Elizabeth WarrenOvernight Defense: Appeals court revives House lawsuit against military funding for border wall | Dems push for limits on transferring military gear to police | Lawmakers ask for IG probe into Pentagon's use of COVID-19 funds On The Money: Half of states deplete funds for Trump's 0 unemployment expansion | EU appealing ruling in Apple tax case | House Democrats include more aid for airlines in coronavirus package Warren, Khanna request IG investigation into Pentagon's use of coronavirus funds MORE (D-Mass.) could be an easy target for Trump, and that her policies might be too progressive for many voters.

Oprah Winfrey Oprah Gail WinfreyNYT security guard who went viral for interaction with Biden will have prominent role at convention: report Louisville Breonna Taylor billboard erected by Oprah Magazine vandalized with red paint 'White privilege' is the biggest white lie of all MORE — once mentioned as a potential candidate herself — begged Disney CEO Robert Iger to enter the race, according to The Washington Post.

“The problem is our party is polarized and there isn’t someone who appeals to everyone and there isn’t that one person who people know can beat Trump,” said one major Democratic donor. “There isn’t a Barack Obama Barack Hussein ObamaDemocrats ramp up pressure on Lieberman to drop out of Georgia Senate race The Hill's Campaign Report: Biden on Trump: 'He'll leave' l GOP laywers brush off Trump's election remarks l Obama's endorsements Trump pledges to make Juneteenth a federal holiday, designate KKK a terrorist group in pitch to Black voters MORE. There’s Joe Biden, who is far from perfect, and there’s Elizabeth Warren, and I just don’t think she’s electable.

The Democratic Party has a history of incessant worrying when it comes to presidential elections, some say for good reason.

Democrats won the popular vote in 2000 but saw nominee Al Gore Albert (Al) Arnold GoreGallup: 61 percent support abolishing the Electoral College Business groups start gaming out a Biden administration Cruz says Senate Republicans likely have votes to confirm Trump Supreme Court nominee MORE fall to his Republican challenger, George W. Bush, in the electoral college by 537 votes in Florida — and a fight over hanging and pregnant chads.

In 2004, they thought then-Sen. John Kerry John Forbes KerryThe Memo: Warning signs flash for Trump on debates Divided country, divided church TV ads favored Biden 2-1 in past month MORE (D-Mass.) would defeat Bush only to see him lose in another close election.

After eight years of a Democratic president in Obama, they suffered the biggest upset in modern presidential history with Clinton’s loss to Trump, even as their candidate again won the popular vote.

“There is a culture of feeling like victory is going to be snatched, and that colors a lot of the thinking of the chattering class,” said Democratic strategist Zac Petkanas, who worked on Clinton’s campaign in 2016.

Julian Zelizer, a professor of history and public affairs at Princeton University, said the current mood of the party is most reminiscent of 2004.

“Democrats were very eager to prevent a second Bush term so the stakes for the right candidate felt intense,” Zelizer said.

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Former Vermont Gov. Howard Dean was an early front-runner, but Democrats ended up backing what was seen as a safer choice in Kerry.

Nothing makes Democrats more anxious than thoughts of a second Trump term.

“For as long as I have been a Democrat, I remember my fellow Democrats saying that every election was the most important in their lives,” said former Rep. Steve Israel Steven (Steve) J. IsraelThe Hill's Morning Report - Sponsored by Facebook - Trump previews SCOTUS nominee as 'totally brilliant' The Hill's Morning Report - Presented by Facebook - Trump, Biden intensify battleground focus as 2020 race tightens Biden allies express confidence as convention begins MORE (N.Y.) who served as chairman of the Democratic Congressional Campaign Committee. “But this year, with Donald Trump, Democrats know it’s not rhetoric but reality.

“There’s a sense that Trump’s reelection is not just an existential threat to Democrats but to democracy itself,” Israel said. “The high stakes have heightened Democrat’s anxiety about getting this right. It explains the polling that consistently show Democrats preferring a candidate who can beat Trump to one who shares their ideology.”

Petkanas said nervous Democrats should just “get over it.”

“Poll after poll shows that the top tier of the Democratic field are all beating Trump nationally and in battleground states,” he said.

Vale said that Democrats don’t need a new candidate, saying if voters don’t like Warren, Biden or Sanders, “we’ve got plenty of more options for you without naming corporate CEOs who actually have no chance of beating Trump.”

Zelizer said the party is currently suffering from “no sense of confidence and a great fear of the future.”

“As a party, Democrats are more divided than the GOP,” Zelizer said. “There is more variation, which generates more fears about voters potentially splitting away from the nominee.”

There’s also one more factor.

“We don’t know what’s coming given how far Trump will go to win,” he said.