TO say that it was a political roller-coaster of a fortnight for Bookanakere Siddalingappa Yeddyurappa would be a gross understatement. With his back to the wall for much of October, the beleaguered Karnataka Chief Minister of the Bharatiya Janata Party (BJP) just about staved off a strong intra-party challenge to his leadership and authority by a group of dissidents led by three brothers, G.