Dark money is something many Democrats have spoken against for decades but a new report showed that they are knee deep in it.

Democrats have constructed a vast dark money network that funneled around $600 million to leftist causes and groups a newly released tax form shows, via the Washington Free Beacon:

The massive cash flow came from Arabella Advisors, a D.C.-based organization that says it provides “strategic guidance for effective philanthropy.” In reality, the group does far more, funneling hundreds of millions of dollars in anonymous donations to some of the most influential advocacy groups on the left.

Entities traced back to Arabella have invested more than $1 billion powering liberal activist and interest groups since President Donald Trump took office. The establishment of the complex network of nonprofits marks the Democrats’ adoption of a once-derided Republican strategy: building a massive funding network that provides donors anonymity.

The practice came under heavy criticism from President Barack Obama and other top Democrats, who lambasted the use of dark money from right-leaning financiers such as the Koch brothers. Yet liberal groups have fully embraced its usage and are now doing so at a much higher level than Republicans: More than $150 million in dark money was spent throughout the 2018 election cycle, 54 percent of which came from liberal groups and only 31 percent from conservative groups.

Eric Kessler, a former Bill Clinton appointee and member of the Clinton Global Initiative, is the founder and head of Arabella Advisors. Kessler also established a series of so-called fiscal sponsors, groups that offer their legal and tax-exempt status to other groups that are not yet recognized as nonprofits by the IRS, including the New Venture Fund and the Sixteen Thirty Fund.

A host of liberal advocacy groups sit beneath those two organizations using the tax-exempt status they provide. While a Politico report indicated that the Sixteen Thirty Fund spent $141 million on Democratic causes in 2018, that represents just a fraction of the total sum of money passed through Arabella and its fiscal sponsors to smaller activist groups last year.

A tax form for the New Venture Fund showed $373 million came through the group which made it the biggest group working with Arabella.

Another fund, The Hopewell Fund, spent $78 million, and environmental group Windward Fund spent another $13 million.

Altogether, groups working with Arabella spent a whopping $622 million from liberal donors in 2018 alone, The Beacon reported.

Millions went to Demand Justice, a group led by Brian Fallon, Hillary Clinton’s former press secretary.

The group is designed to fight back against President Donald Trump’s judicial nominees and was on the front lines of the fight to stop Supreme Court Justice Brett Kavanaugh.

Demand Justice does not have to disclose its tax forms, but looking at the tax forms of other organizations shows a connection to billionaire George Soros, The Beacon reported.