A U.S. Supreme Court case over water sharing has Georgia and Florida showing up with teams of lawyers, expert witnesses and stacks of carefully documented evidence. “The methodical nature by which they are prosecuting every possible fact — that was impressive,” said Juliet Cohen, executive director of Chattahoochee Riverkeeper, who has watched part of the trial in Portland, Maine. “But it’s unfortunate at the same time, because my sense is that had the states had put half of that effort into honest, good-faith negotiation, we could have resolved this a long time ago.”