Hazare, who had refused to campaign for Kejriwal's party, expressed happiness over AAP's performance in the Delhi elections where Sheila Dikshit has served as Chief Minister for 15 years.
"Definitely. Delhi is the Centre of politics of country's politics. It is not an easy task to defeat a government which is ruling there with just a broom in hand.
"The old parties have a lot of money. I feel happy that in such a situation, his party has emerged victorious and got 24 seats," Hazare told reporters when asked about AAP's performance.
"If it is not possible to form a government, fresh elections should be held."
The Gandhian said people voted for Kejriwal's party as they felt it will be more concerned about them and hailed what they have done.
"One day he will become Chief Minister on the strength of his party workers," Hazare said about Kejriwal.
Hazare said Congress makes rules like allowing one to contest from jail while not caring to make good laws.
"If Congress does not mend its ways even after this, then people will teach it more such lessons in the Lok Sabha elections," Hazare said.
Defending his decision not to campaign for Kejriwal and AAP, he said, "It is a party and so it is difficult for me (to campaign). I do not campaign for any political party.