It was like a Chicago City Council meeting broke out in the U.S. Senate.

Senators summoned Jamie Dimon, the chairman and CEO of JP Morgan Chase, to answer questions about how and why the bank lost $2 billion, give or take $6 billion, in investment schemes that no one seems to understand.

Instead it became little more than a session at the batting cage for Dimon, who swatted away most of their softball lobs without saying much at all.