Exelon, a major electricity generating and distribution company, left the Chamber of Commerce a few weeks ago. Their departure came relatively early on in an unprecedented string of departures from the Chamber.

Last night in Philadelphia Exelon’s CEO John Rowe clarified his company’s reasoning for leaving the Chamber:

“We did it because on this issue, which we think is fundamental to the ecology, the economy, and to Exelon, we were at odds with the expressed position of the chamber.”