Congress chief Sonia Gandhi, vice president Rahul Gandhi, Left parties and CMs of various states congratulated Kovind.
The NITI Aayog will now assimilate the views of states and then present a report to the PM.
Glimpses of I-Day celebrations across India.
In Delhi, the poor are pitted against the middle class, with the former led by Arvind Kejriwal and the latter by Prime Minister Narendra Modi.
