TORONTO — Prime Minister Jean Chretien's Liberal Party swept to victory Monday in five of six by-elections for vacant parliamentary seats, including one district where Quebec separatists had fielded a strong challenger.
The Bloc Quebecois' only victory came in the central Quebec district of Lac-St.-Jean, where Stephane Tremblay, a 22-year-old student, easily defeated the Liberal candidate to fill the seat vacated by Lucien Bouchard.

