Ruling party officials say victory in Insiza and a third seat left vacant by the death Tuesday in a jail cell of an opposition lawmaker, is an important step towards reducing the opposition's power in the 150-seat parliament. Mugabe appoints 30 lawmakers and needs a two-thirds majority vote to change the nation's constitution. The opposition has blocked proposed constitutional changes. If the ruling party wins the two by-elections it will be four seats short of carrying a two-thirds vote.***