Emails and interviews reveal privacy-obsessed electronics magnate Barre Seid’s long history of backing efforts to attack climate science, fight Medicaid expansion, and remake the higher education system in a conservative mold.

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.