I just heard an interesting detail about covering political campaigns. News companies have a limited number of reporters to cover events, and they have to carefully distribute their resources. Each additional candidate requires more people, so the media has to choose a small number of candidates, (three at most, preferably two). Those candidates receive coverage, and the rest are essentially ignored.
This is why we get "write-off" candidates every campaign: the media picks the candidates that they decide can win. Often times they're right, most candidates don't have a chance. But this effect should bring chills to people who believe in Democrazy.