From The Truth About Guns:

David Dell’Aquila is the National Rifle Association megadonor who became disillusioned with the Association the more he found out about how it operates. He then began a dissident movement to withhold planned donations from the NRA in order to force a clean-up in Fairfax. He eventually went so far as to file a multi-million dollar class-action lawsuit against the NRA and NRA Foundation on behalf of the membership over dues and donated funds that were allegedly diverted or misused.