Tejashwi Yadav, the son of Bihar leader Lalu Yadav, today said he was working with Rahul Gandhi to "save democracy and the constitution". The 28-year-old, seen as the political heir of Bihar Veteran Lalu Yadav, is known to share a rapport with the Congress chief. Today, on the question of the Rahul Gandhi as the prime ministerial candidate of the united opposition, Tejashwi Yadav gave a cautious response that took nothing for granted.