Chris Goodney/Bloomberg via Getty Images
- Senate Democrats pushed forward on a subpoena of Harlan Crow.
- The GOP megadonor has been at the center of ethics concerns regarding Justice Clarence Thomas.
- Republicans railed against the move, which they have repeatedly tried to delay.
Senate Democrats on Thursday voted to issue subpoenas to GOP megadonor Harlan Crow and conservative legal activist Leonard Leo after months of reporting called into questions potential ethical violations by conservative Supreme Court justices.