The Federalist Society did not propose this.
Who cares?
I don't know, why don't we just claim that this was proposed by the American Bar Association then if it doesn't matter.
OK, I'll be serious and non-cynical: Two members of the Federalist Society, including a founding member of one of the earliest campus chapters, proposed this.
I agree that it's very sloppy and misleading writing at best to say the "the Federalist Society" proposed this rather than a very early member and co-founder of the organization. Distinctions are constantly collapsed in headlines and even article bodies, and perhaps this distinction is important.