UPA collapsing over presidential polls?

Mamata Banerjee and Mulayam Singh Yadav's shocker of naming Dr Manmohan Singh among its candidates for President has the led the battle for Raisina Hill straight to 7 Race Course Road - the Prime Minister's residence. In what is an unprecedented first in Indian politics, the name of a sitting Prime Minister was proposed for President throwing the field wide open to speculation of a mid-course change of the Prime Minister and Dr Manmohan Singh's waning authority.