[onedoug]

Maybe it’s me. But I don’t see anything there to indicate that Gowdy knew of this before he read it in the NY Times as well.

[cornelis]

Maybe it's me.

Here's more:

The committee, Gowdy said, has known since last summer that Clinton, the front-runner for the Democratic Party’s 2016 nomination, used personal email addresses while serving as secretary. He said the committee has worked with Clinton advisers and the department to gain access to documents relating to the Benghazi attacks. linky

That's where McCarthy takes it from.