27% is huge. Moat of these people will vote, 50% of the nation won't bother. Initially only about 33% supported the idea of independence from England, so that's getting close. I wouldn't poo poo 27%. Consider what gay "rights" activists have done with less because they fanatically promote their cause. The key is ambitiously doing something.
The GOP-e doesn't think that's a significant number either, although they're barely 15% themselves.