But filter-free media are self-limiting. To begin with, anything that Sarah Palin tweets goes out unfiltered. That's all well and good, but within seconds, the uber-media will suck it up, interpret it, fact-check it, and spit it out, making a mockery of her unfilteredness. Second, because the nonpress media speak primarily to supporters, they simply preach to the converted. To win, candidates must speak to more than the congregation, which requires conventional media exposure. Third, appearing on a friendly soundstage comes at a cost. A Tea Partier speaking on Fox News is just as prone to committing a campaign-debilitating gaffe as one taking a pummeling from aggressive reporters.