LOL! He's pulling a McCain and ensuring nothing gets done because he don't like some of it - and helping ensure that the Senate remains a do-nothing body. Goes to show that some folks call it "principle" when they endorse a singleton for gumming up the works - but only when they approve of the gum job.
Rand is pretty much the poster boy of the “Party of No” GOP caricature the Dems love to use. He’s never advanced the conservative agenda in substantive way but that won’t stop him from another virtuoso beltway theater performance.
Any authority and the very existence of Congress is derived form the Constitution. Rand Paul is one of the very few Senators who actually uses the Constitution as a basis for his actions. That is what sets Paul apart, including dealing with the utterly unconstitutional Obamacare, from the rest of the senatorial pack.