Support for UPA has been falling with more and more scams coming out.Parties supporting UPA may not like to to be seen as supporters of corrupt regime.They will leave UPA one by one at slightest pretext leading to early elections.
Yes,before all parties get into deeper trouble,they would prefer to insure another five years by going to polls.Now polls seem to be their best savior.
REMOTE POSSIBILITY OF ALLIES PULLING THE PLUG ON THE GOVT. BUT SCAMS EXPOSURE CONTINUING, COULD BRING DOWN THE GOVT. IF IT DOES NOT PUT UP A CREDIBLE DEFENSE