On the first anniversary of the Supreme Court’s ruling in Citizens United, which overturned nearly a century of restrictions on campaign spending, a progressive group has asked the Department of Justice to look into ‘conflicts of interest’ two justices may have had when issuing the ruling.

In a petition to be sent to the department this week, Common Cause will argue that Justices Antonin Scalia and Clarence Thomas should have recused themselves from the campaign finance decision because of their involvement with Koch Industries, a corporation run by two conservative activists who many say directly benefited from Citizens United.

‘It appears both justices have participated in political strategy sessions, perhaps while the case was pending, with corporate leaders whose political aims were advanced by the decision,