Yesterday I flagged this NYT oped by Kathleen Donovan-Maher and Steven Groopman, “Why Dark Money is Bad Business.”

The second sentence reads: “So far two-thirds of election dollars have largely come from anonymous corporate donations, funneled through what have been referred to as “dark money” nonprofit groups that freely engage in electoral and legislative politics, but don’t have to disclose their donors, expenditures or even their members.”

There’s no hyperlink supporting the sentence and it strikes me as way off the mark.  Any sense of where this number comes from?

Update: Robert Maguire of Open Secrets doesn’t see support for this statement.

MORE reactions on Twitter.