THE CONSULTING FIRM led by Leonard Leo, the architect of the Supreme Court’s conservative supermajority, has worked for billionaire Charles Koch’s political advocacy network and a dark-money group that is currently arguing a Supreme Court case designed to preempt a wealth tax, according to documents obtained by Rolling Stone. The firm even worked to promote a book by Donald Trump cronies Corey Lewandowski and David Bossie.

Leo has played a central role in shifting the high court and its decisions far to the right. As former President Donald Trump’s judicial adviser, Leo helped select three of the Supreme Court’s six conservative justices. He also leads a dark-money network that boosted their confirmations and helps determine what cases the justices hear and shape their rulings.

The Supreme Court connection has paid off for Leo — big time. In 2021, he was gifted control of a $1.6 billion political advocacy slush fund. Over the past decade, Leo’s dark money network has plowed more than $100 million into his for-profit consulting firm, CRC Advisors.

Leo co-chairs the Federalist Society, the conservative lawyers network. He is also the chairman of CRC. Like many consulting firms, CRC does not publicly disclose its clients. However, several of the firm’s clients were named in resumes that applicants submitted to an online jobs bank hosted by the Conservative Partnership Institute, which accidentally left the files exposed online.