In the largest known political advocacy donation in U.S. history, industrialist Barre Seid funded a new group run by Federalist Society co-chair Leonard Leo, who guided Trump’s Supreme Court picks and helped end federal abortion rights.

By Andrew Perez, The Lever, and Andy Kroll and Justin Elliott, ProPublica

An elderly, ultra-secretive Chicago businessman has given the largest known donation to a political advocacy group in U.S. history — worth $1.6 billion — and the recipient is one of the prime architects of conservatives’ efforts to reshape the American judicial system, including the Supreme Court.

The US Supreme Court in Washington DC with dark storm clouds

Through a series of opaque transactions over the past two years, Barre Seid, a 90-year-old manufacturing magnate, gave the massive sum to a nonprofit run by Leonard Leo, who co-chairs the conservative legal group the Federalist Society.

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