In 2006, Leung co-founded the social democratic party League of Social Democrats (LSD) with legislator Albert Chan and radical pro-democrat radio host Wong Yuk-man. In the 2008 Legislative Council election, Leung was re-elected in the New Territories East while Chan and Wong were also elected in New Territories West and Kowloon West respectively which made the LSD in the third largest pro-democracy party after Democratic Party and Civic Party, which took a more moderate and pro-middle class position as compared to the LSD.