Read my post 54:
http://www.freerepublic.com/focus/f-news/3169278/posts#54
Very clear explanation straight from the mouth of MS Secretary of State Hosemann.
Who is an “eligible voter” in the Republican primary? Is MS a closed primary state? If so, then how could there be an “eligible voter” voting in the R primary runoff who is not a registered R?
What law is the SOS citing?