Bloomberg BNA:

The Federal Election Commission deadlocked on whether to investigate a long-pending case involving alleged violation of campaign finance rules by the American Future Fund (AFF), a nonprofit organization linked to the so-called Koch Network of politically active nonprofits, according to documents released by the FEC on Dec. 29.

Republican and Democratic FEC commissioners voted along party lines regarding a staff recommendation to investigate whether the AFF was required to register with the FEC as a regulated political action committee and report its donors. The case was designated Matter Under Review (MUR) 6402.