THE odds are heavily stacked against them. The leaders of the Bharatiya Janata Party (BJP) may be asserting in public that they will be able to prove their majority in the Lok Sabha and save their fledgling Government. But in private conversations most of them agree that the going is indeed tough. A very senior leader, in fact, admitted the possibility of Prime Minister Atal Behari Vajpayee resigning well before the confidence vote comes up before the House. "If our gambit of electing a speaker unanimously fails, and if the Third Front-Congress combine stays firm and elects its own candidate, Vajpayeeji may decide not to wait for the formal defeat of the confidence motion," he said.