An entire section of Kentucky Sen. Rand Paul’s 2013 book Government Bullies was copied wholesale from a 2003 case study by the Heritage Foundation, BuzzFeed has learned. The copied section, 1,318 words, is by far the most significant instance reported so far of Paul borrowing language from other published material.

The new cut-and-paste job follows reports by BuzzFeed, Politico, and MSNBC that Paul had plagiarized speeches either from Wikipedia or news reports. The book was published in August 2013 by Center Street, a division of Hachette Book Group.

In this case, Paul included a link to the Heritage case study in the book’s footnotes, though he made no effort to indicate that not just the source, but the words themselves, had been taken from Heritage.

A Paul aide defended the senator, saying he makes clear in the book’s “notes and sources” that he didn’t individually research each case.