When Sheryl Corrigan announced her resignation as head of the Minnesota Pollution Control Agency late last month, political observers and environmental activists alike were left to scratch their collective noggin and ask why. And: Why now? The official story—that Corrigan wanted to spend more time with her family before returning to the private sector—may have been correct; then again, that line or one like it is almost always invoked when a high-ranking political appointee... More >>>