Aam Aadmi Party chief Arvind Kejriwal has challenged the BJP's Kiran Bedi to a public debate. Ms Bedi is yet to respond. "Congrats 4 being nominated as BJP's CM candidate. I invite u 4 a public debate moderated by neutral person n telecast by all," he tweeted this morning. He also tweeted, "Kiranji, i used to follow u on twitter. Now, u have blocked me on twitter. Kindly unblock me."