The former Supreme Court lawyer for the Barack Obama administration and a Democratic senator-turned-lobbyist are pressuring justices to block Congress from ever instituting a wealth tax on the superrich, according to court filings reviewed by the Lever.

Former acting solicitor general Neal Katyal recently submitted an amicus brief in the Supreme Court case Moore v. United States on behalf of the group Saving America’s Family Enterprises (SAFE). That anonymously funded group — whose board includes corporate lobbyists — has spearheaded campaigns against Democrats’ efforts to tax the inheritances and wealth of millionaires and billionaires.

Now the group is aiming to use the obscure corporate taxation case to elicit a broad ruling that outlaws all wealth taxes.