GOP Chairman Marcus Karavan plans to challenge signatures on a p

Court House - GOP Chairman Marcus Karavan plans to challenge signatures on a petition filed by Pat Taylor, and interview those who signed. Once a registered voter signs a petition and it is validated by the County Clerk, what is Karavan trying to do? The people have previously spoken and so be it. Dan Lockwood was defeated by a Democrat. And the people spoke then. Why does the GOP support a person who lost a previous election? There must be others who would be supported by the GOP, or the GOP has run out of electable people?