It is not a test for unity of opposition. It is again a test for existence of Congress. If opposition chooses a non-congress candidate, then Congress is losing one more important position. It will establish the degeneration of this party. If Congress insists to elect Dy Speaker from their party, the unity thought is over. Either way Congress is going to be the loser. Congress has to fight it alone in the LS polls in 2019. If not it will be reduced to a regional party in a few states. Ha Ha Ha Ha.Cheers !