Reason TV has an excellent video interview (embedded below) with libertarian law professor Richard Epstein, who talks about his former University of Chicago law school faculty colleague, Barack Obama.
Professor Epstein gives the constitutional challenge to Obamacare a 20 to 25% chance of success, and he comes out against means-testing for Social Security or Medicare, arguing that that would increase the level of redistribution (an obvious point but one that alas seems lost on, or at least nondispositive to, a lot of people.)