But soon after winning a confidence vote of 93.6% of the delegates at the April 2011 party convention, two crises shook the PQ leader. Two weeks after her confidence vote, the Bloc Québécois lost all but four of its seats in the House of Commons of Canada in the May 2 federal election, soon followed by a confidence crisis caused by a private bill introduced by Marois loyalist Agnès Maltais facilitating the construction of a publicly funded multipurpose amphitheatre to replace the aging Colisée Pepsi in Quebec City. Marois` insistence on maintaining the party line caused a revolt. Marois had previously resisted popular initiative referendums, but supported them to retain her leadership during this crisis (but not after she won power.) One result was the resignation of four heavyweights in her caucus: Louise Beaudoin, Pierre Curzi, Lisette Lapointe and Jean-Martin Aussant.