Why it should be handed over to the speaker...so that, speaker would have called PM and asked him, respected PM, opposition is blaming you for so and so reason... and PM with all respect would have accepted the alligation and said, .... ok... i will resign..... stupid. since it was tabled in parliament, atleast whole india is now discussing. otherwise, it would have been dumped in some corner of parliament and nobody would have known it. and CBI would have helped PM in doing that.
