Why has Andy Karsner frightened the mighty ExxonMobil?
The oil giant spent millions of dollars to keep Karsner, a Republican who favors renewable energy, off the company’s board of directors. It failed. Clay Sell was drifting off to sleep at home in Dallas when the phone rang. It was Alexander “Andy” Karsner, who reported to Sell at the Energy Department during President George W. Bush’s administration and had become a friend.