As Rand Paul said, the filibuster was not so much about blocking the nomination of John Brennan as much as it was about asking President Obama to say Americans will not be killed on US soil by drones if they're not engaged in combat. Paul specifically stated that he wanted the Obama administration to answer the question as to whether they believe it is acceptable under the Constitution to kill American citizens on US soil using drones if those citizens are not engaged in an immediate terrorist threat.
It was a simple, common sense request that even the professional moral relativists of the Democrat Party could not escape. It was an issue on which both Democrats and Republicans should agree. Paul gave an uncomplicated argument that the federal government should protect life and the basic civil liberty of due process. What was their response?
Liberals responded on Twitter with the trend #WhyRepublicansNeedToGo. The White House tweeted a picture of President Obama's dog from February 2010. And President Obama tweeted an old photo of himself playing in the snow. For all intents and purposes, Democrats and liberals failed to respond and rejected the seriousness of the issue.