Scott VanderWal came across the South Dakota border to southwest Minnesota’s Farmfest to scare farmers. The American Farm Bureau vice president wasted no time doing that as keynote speaker Wednesday before a panel launched into a water issues discussion. “Right this minute, a California farmer is in the legal battle of his life over Waters of the U.S.,” the Volga, S.D., farmer said about rules federal authorities have released, but courts have put on hold until court cases can be decided.