Group of SFF writers feel that the Hugos are a "liberals only" club. They gather votes from other likeminded individuals and, as a result, sweep the Hugo nominations. This partially results from people that would normally object to this sort of SFF being too busy to cast their votes. Technically, what this group did isn't against the rules. Its really cautionary, a reminder of the importance of one's vote.
But, its their logic that baffles me. They refer to themselves as the Sad Puppies, and pine for the days when SFF was all about space battles, muscular barbarians rescuing fair maidens...the days when SFF didn't tackle more weighty issues. The thing is...pulp SFF has always been political. On some level.
Then there's a spinoff of the Sad Puppies referring to themselves as the Rabid Puppies. They've taken a more antagonist approach to this all, calling out authors they believe are corrupting the SFF genre. This group wants to see a change in the Hugo voting rules that would make nominations more exclusive...so they have a bit of a martyr thing going on.
Their logic is faulty. You have a pretty equal division, politically, among Hugo nominees and winners throughout the years. If anything, it sounds like they want the award to help sell their product.
GRRM did a lengthy response and takedown to the whole thing:
http://grrm.livejournal.com/