EVANSTON—Jon Leuer scored 19 points to lead a balanced attack and No. 18 Wisconsin rolled to a 78-46 Big Ten victory over Northwestern on Sunday.Keaton Nankival had 16 points and Taylor Jordan added 14 as the Badgers (15-4, 5-2 Big Ten) won their third straight game to remain third in the conference standings.Wisconsin freshman Josh Gasser had a triple-double with 10 points, 12 rebounds and 10 assists.John Shurna and Luka Mirkovic scored 13 points apiece for the Wildcats (13-6, 3-5).The Badgers broke the game open midway through the opening quarter and put it out of reach early in the second half.The victory margin was Wisconsin’s most lopsided of the conference season and third largest of the year.