The incurably foul toilet of a general class compartment of a train is hardly a suitable space to spend more than a few minutes on a regular day for most people. But for the next 15 hours, with the temperature hovering around 42 degrees Celsius, daily wage earner Nandkumar and his friend Rahul are travelling home to Bihar, squashed between the decrepit plumbing and their determination to vote in the ongoing national elections.