PLYMOUTH, WI (WHBL) - A Plymouth woman has thrown her hat into the ring for the 9th District State Senate seat currently held by Joe Leibham. Martha Laning will formally announce her candidacy at the Generations Intergenerational Center in Plymouth that she helped to create. The announcement is set for 11:30 this morning. Laning will run as a Democrat against the Republican Leibham who has held the seat since 2002. In the last election in 2010 he defeated Jason Borden of Sheboygan by a 3 to 1 margin.