On the eve of the party's "Tiranga Yatra" in Jaipur led by Chief Ministers Arvind Kejriwal and Bhagwant Mann, AAP leader Vinay Mishra on Sunday said about four-and-a-half lakh people have become its members recently and that the party was optimistic about its performance in the coming assembly polls in Rajasthan. He said the party's chief ministers will sound the poll bugle in the state with the yatra and appealed to people to join it.