. >> rose: we end with michael waldman with his book called the second amendment. >> when you look at the second amendment, the way we understand it is not the product of some sort of pristine constitutional text but always results in kind of a push and pull and rough of tumble of political advocacy and public argument. so over time, we understood it differently, but it is the case that until very recently the supreme court and constitutional experts didn't think the second amendment recognized an individual riot to begun initiative. >> rose: amy poehler, atul gawande and michael waldman when we continue. >> and by bloomberg, a provider of multimedia news and information services worldwide. captioning sponsored by rose communications from our studios in new york city, this is charlie rose. >> rose: amy poehler is here. she's an actor, she's a comedian, she's much more. she was a cast member from saturday night live from 2001-2008. she's now on parks and recreation. she's written a book called yes, please. so i am pleased to have amy poehler back at this table. now look at this, mr. an