[Cyber Liberty]

Each house of Congress has the power to enforce its rules and privileges.

Why is Holder walking around free? Kind of puts the lie to common sense, doesn't it?

[Ray76]

Here’s a detailed analysis from a DC think-tank

http://www.constitutionproject.org/documents/when-congress-comes-calling-a-primer-on-the-principles-practices-and-pragmatics-of-legislative-inquiry/