On Tuesday the Supreme Court refused to hear Michigan's case against Illinois which sought to close the waterway connecting to the Great Lakes to block passage of Asian Carp into Lake Michigan.
Also on Tuesday the Army Corps of Engineers announced that carp DNA has been found in Calumet harbor. No carp have yet been found, but DNA evidence seems to indicate at least one fish has made it into the Great Lakes. If a breeding population can get established Lake Michigan, the natural ecosystem and fishing industry will be devastated.