Greenwire: In a nail-biting year for many congressional hopefuls, Indiana Republican Dan Coats is an outlier — poised to easily reclaim the Senate seat he held for most of the 1990s despite a five-year lobbying stint that left Democrats eager to paint him as a Washington insider. But Coats’ race against Rep. Brad Ellsworth, a once-rising Democratic star whom most polls show trailing by at least 16 points, is equally anomalous when it comes to environmental policy. With coal and ethanol …