No, it’s an open primary that the GOP loves so much.
/johnny
It is still against the law has been stated for people to vote in a runoff for someone they do not intend to vote for in the general.
http://www.breitbart.com/Big-Government/2014/06/18/Top-Ex-DOJ-Attorney-It-s-Illegal-For-Democrats-To-Vote-In-Mississippi-s-GOP-Primary-Runoff