Just so you understand their position...

Republicans think that what the President does is OK.

So, they think it's ok for the NSA to watch and listen to you without a warrant. They think it's OK to hold 'enemy combatants' indefinately without due process.

So when the government comes for you, calls you a terrorist, and locks you up, you'll have no means to show the evidence against you was obtained illegally.

See now why it's so important?