Israel's industry and trade minister, Ariel Sharon, strengthened his bid for the leadership of the right-wing Herut Party by winning a key post at the party's convention. Sharon defeated Benjamin Begin, son of former Prime Minister Menachem Begin, to win the chairmanship of the party's mandate committee, which screens convention delegates. Sharon is challenging Foreign Minister Yitzhak Shamir and Deputy Prime Minister David Levy for the leadership of Herut. Late in the day, a Sharon aide was elected convention president. Sharon's shouting supporters prevented Shamir from addressing the gathering, and fistfights broke out among delegates.