A lot of them are manipulated, and are run by the left. They often have the democrat up in order to demoralize the republicans, but that is not working this election. Instead, Hillary is measuring drapes instead of campaigning, while Trump keeps campaigning.
I expect them to flip the numbers soon, in order to give Hillary a hint to keep campaigning.
To me these candidates are so well known (probably the most well known POTUS candidates in history) and so far apart in philosophy I just can’t see where campaigning makes a bit of difference.