http://www.c-span.org/Live-Video/C-SPAN2/

A few highlights so far: 

"The Constitution was not written to protect the government from you, it was written to protect you from the government." 

"When your government won't tell you they are not going to do something, they are saying they are going to do that something. If they don't answer our questions that they won't kill Americans who are not in combat, they are saying 'Yes, we will kill American citizens who are not in combat.'"

"When the President says 'I haven't killed any Americans yet, and I don't intend to kill Americans, but we might.' I don't think that is a response we should tolerate."

"This is what we are talking about. Don't think if we give the President eminent power to kill Americans, it's temporary. It's not temporary, it's permanent."

"If you give up your rights now, don't expect to get them back."

"What kind of standard will there be if we are going to kill Americans in America? If the standard is going to be 'There will be sympathy.' What kind of response is that?"

"The use of drones to execute American citizens on American soil clearly violates our civil rights. The use of lethal force against American citizens and the use of drones in the US territory is something we will not allow."

"We are not suppose to be asking the President for the memo, we are suppose to be giving him the memo. We are not suppose to asking the President how he is going to use drones, we are suppose to TELL him how he is going to use drones. We are the checks and balances. We have the authority."

"The Constitution does apply to Americans inside the United States with no exceptions."

“I will speak until I can no longer speak. I will speak as long as it takes, until the alarm is sounded from coast to coast that our Constitution is important, that your rights to trial by jury are precious, that no American should be killed by a drone on American soil without first being charged with a crime, without first being found to be guilty by a court.” 

~ Senator Rand Paul 

This is about a Resolution that was presented to the President concerning drones killing American citizens on American soil, utilizing a 'kill list' of American citizens that are deemed a threat to the President and sent by the President with no oversight by anyone. They are asking for an answer to these 2 points:

Part I: Killing non combatant citizens
Part II: Giving Congress a full report on the killing of American citizens by drones on US soil.