There is no such thing as an Independent voter.

There are now (and always have been) just two kinds of voters:  

People who are Partisans.
And people who are Dependents.

Dependents are voters who insist an being the true outsiders - the people dependent on what partisans decide to offer them as alternatives.
They partially disenfranchise themselves - all the while moaning and complaining about what rotten alternatives the partisans give them.

One wonders why they bother to vote at all.  Voting means so little to them.  They cannot decide which group to hate - possibly preferring  to hate them all?