Fact-driven, fair, aggressive journalism animates American politics. As an investigative journalist, I am accustomed to asking tough questions. When I publish, I expect tough questions in turn,

That's not what ABC News This Week host and chief anchor George Stephanopoulos delivered when he interviewed me about my new book on the Clinton Foundation last month. There's a reason. Though Stephanopoulos belatedly disclosed$75,000 in donations to the foundation, he has yet to disclose his much deeper relationship with the Clinton Foundation.

When Stephanopoulos invited me on his Sunday program, I knew that he had worked as a top adviser and campaign manager to President Bill Clinton in the 1990s, but I didn't know about his donations or his other ties to the foundation founded and overseen by the former president and his wife, potential future president Hillary Clinton.