MANHATTAN BEACH, Calif.--(BUSINESS WIRE)--SKECHERS USA, Inc. (NYSE:SKX), a global leader in the lifestyle and performance footwear industry and the number two footwear brand in the United States*, today announced that it filed a lawsuit against Steven Madden Ltd. for selling footwear that infringes on the popular SKECHERS GO WALK® product line as well as other popular SKECHERS product lines. The suit, filed in the United States District Court for the Central District of California, seeks compen