If tea party Republicans stick to plans to defund Planned Parenthood - even at the cost of a government shutdown - it would raise questions about whether the movement is driven more by small government ideals or classic Republican 'values' issues.

Conservative groups' mounting attacks against Planned Parenthood are beginning to expose rifts within the tea party movement that could grow more pronounced as Congress nears a potential government shutdown April 8.

Read the complete story (Some news sites require registration)