Koch Brothers To Open Permanent Americans For Prosperity Office In South Dakota

From this Washington Post article:

Americans for Prosperity, the on-the-ground wing of the network of conservative organizations spearheaded by the billionaire industrialists Charles and David Koch, will open new state chapters in South Dakota and Alaska in coming weeks, the group’s president said.

I confess this report surprises me. I thought the Koch brothers group already had a permanent office wherever South Dakota Republican legislators caucus in the Pierre.