President Barack Obama’s recently formed dark-money group Organizing for Action confirmed to the Center for Public Integrity Thursday that it would not release donor information such as employer and occupation despite collecting the data in its online donor application.

The Center for Public Integrity reports:

"Our voluntary disclosure will be posted on our website with the exact dollar donation, name and city and state of the donor," Organizing for Action spokeswoman Katie Hogan told the Center for Public Integrity.

As a practical matter, a lack of employer and occupation information makes it more difficult for the public to determine the corporate, union or special interest ties donors may have.

It also complicates confirming their identities, particularly when they have common names. A similar issue arose when Obama's inauguration committee released the names of its donors, but no other identifying information. …

Organizing for Action — the successor organization to Obama's re-election campaign — is not compelled by law to release any of its donor information because it was established as a 501(c)(4) "social welfare" nonprofit group and falls under the auspices of the Internal Revenue Service. It may raise and spend unlimited amounts of money, but electing politicians cannot be its primary purpose.