Based on what you say here about independents, it's rather clear that you are a finance professor and not a political science professor. Amongst political scientists, it's universally agreed that true independents are a very small group in society. Most people who call themselves independents are actually "leaners" who consistently vote for one of the two major political parties.
For the data and more links, see (a post that was actually written by a political scientist).
http://www.themonkeycage.org/2009/12/three_myths_about_political_in.html

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