[Cyberbob]

Polls create massive bias. They can be used to easily manipulate.

If I'm an undecided voter, and then see the public opinion of one party/leader is doing 10 points worse and one is doing 10 points better, that could be all I need.

Heck I'm seeing the minor parties in the polls doing really well, and it wouldn't be far fetched to think "It looks like it's not just a two horse race, maybe some real change will happen if I vote for the minor parties too"