"Leo has spent more than two decades at the influential Federalist Society, guiding conservative judges into the federal courts and the Supreme Court itself.

In 2018, conservative justice Clarence Thomas joked that Leo was the third most important person in the world.

In 2020, after Trump lost the election, Leo stepped back from running the daily operations of the Federalist Society, while remaining its co-chair.

The following year, Leo founded Marble, with a $1.6bn donation from electronic device manufacturing mogul Barre Seid, to be a counterweight to what he said was "dark money" of the left. He spent about $600mn in its first three years, according to public financial disclosures."

more on Barre Seid, the Tripp Lite King...

"Seid opposed the ban of DDT and funded activists and researchers who opposed the ban.[5] Seid's giving reflects his belief that global warming is not the result of human emissions."

"In 2020, Seid donated Tripp Lite to the newly created nonprofit group Marble Freedom Trust headed by Leonard Leo, a conservative legal activist.

In March 2021, Marble Freedom Trust sold Tripp Lite to the Eaton Corporation for $1.65 billion.[2][1]
The donation was made anonymously, but Seid's identity was first confirmed by The New York Times based on public financial disclosures.[4][1]

The New York Times described the donation as "among the largest single contributions ever to a politically focused nonprofit."[1]"