That's the problem. The people they're polling are the average voter who only knows what CNN tells them. Since CNN will never retract these accusations, the average voter will go into the voting booth believing Trump is a dirty old grabby-grabby man. Many are too young to know anything about BJ's rapes and Hellary's misdeeds and anything that happened before they can remember doesn't exist.
Alternative news travels slower than the MSM but it does travel.