Progressives not surprisingly, hate President Trump’s pick of Judge Brett Kavanaugh. He won’t create rights not enumerated in the Constitution, nor will he legislate from the bench.   Conservatives like him, as he was vetted and approved by the Federalist Society for consideration.  They love him for the same reason the Left hates him. Libertarians have given the choice a cooler reception, citing concerns about privacy rights, especially when it comes to Fourth Amendment protections.  Judge Andrew Napolitano, a libertarian-leaning judge had this to say about the pick:

Now he has given us a nominee to the highest court in the land who typifies the culture he railed against when he claimed he’d drain the swamp. This man and this culture accept cutting holes in the Fourth Amendment because they don’t believe that it should protect privacy. This man and this culture accept unlimited spying on innocent Americans by the National Security Agency because they don’t believe that the NSA is subject to the Constitution.  — Judge Andrew Napolitano

Judge Napolitano’s concerns have been echoed by others on the libertarian side:

Kavanaugh is not another Gorsuch—not even close. Disappointing pick, particularly with respect to his #4thAmendment record. Future decisions on the constitutionality of government surveillance of Americans will be huge. We can’t afford a rubber stamp for the executive branch.  –Rep Justin Amash, (R) MI

Senator Rand Paul, arguably the most notable libertarian on Capitol Hill was also cool on Kavanaugh, reserving his judgment for now…  “I’m not going to make any comment until we’ve had a chance to look through and really go through a discovery process, meet the nominee,” — Sen Rand Paul, (R) KY

Liberals don’t like Kavanaugh, they are deathly afraid of him overturning Roe v. Wade, and would prefer a justice who believes in a “living Constitution”.  Conservatives like him because they think he won’t legislate from the bench.  Libertarians are concerned that he will opt for an interpretation of the Constitution that favors the government over individual rights.  Will Senator Rand Paul, who might well be the deciding vote in the Senate, be able to overlook past rulings on the Patriot Act and NSA surveillance?  Will he decide that perfect is the enemy of good-enough, or will he find he has irreconcilable differences with Kavanaugh’s judicial philosophy when it comes to privacy versus security?