Perhaps as much as 15% or more. It's at least 25% in Illinois and Minnesota. This is why we FReepers call them the SHeeple.
A conservative is constantly thus having to battle the MSM [ i.e., the malign liberal force of gravity, politically speaking ] to hang onto the SHeeple for the election.
Which was my original point.
liberals + sheeple = people_responsible_for_the_liberal_government_we_have.