There's a story circulating that this isn't the first time:
http://reason.com/blog/2013/11/03/report...uls-book-w
Quote: According to BuzzFeed’s Andrew Kaczynski, a whole section of Paul’s book Government Bullies was copied from a 2003 Heritage Foundation case study. The case study is reportedly cited in the book’s footnotes, but there is no indication or acknowledgement that the same words from the study were taken and used in the text of the book.
A spokesman from The Heritage Foundation told BuzzFeed that they “don’t care” about the copying.
http://reason.com/blog/2013/11/03/report...uls-book-w