Secret Recordings Fueled FBI Feud in Clinton Probe . Agents thought they had enough material to merit aggressively pursuing investigation into Clinton Foundation .

The Wall Street Journal reports:

Secret recordings of a suspect talking about the Clinton Foundation fueled an internal battle between FBI agents who wanted to pursue the case and corruption prosecutors who viewed the statements as worthless hearsay, people familiar with the matter said.

Agents, using informants and recordings from unrelated corruption investigations, thought they had found enough material to merit aggressively pursuing the investigation into the foundation that started in summer 2015 based on claims made in a book by a conservative author called “Clinton Cash: The Untold Story of How and Why Foreign Governments and Businesses Helped Make Bill and Hillary Rich,” these people said.

Here's the book.