LUCKNOW, March 20 -- State secretary of traders' wing of the Aam Aadmi Party Gaurav Maheshwari along with his wife Priyanka and a large number of office bearers and workers joined BJP on Tuesday. Priyanka Maheshwari was AAP's mayoral candidate from Lucknow in last civic polls in Uttar Pradesh. Gaurav was a prominent AAP leader in the state capital. His exit from the party is being viewed as a major setback to AAP's efforts to build party's base in Lucknow and rest of the state. "The entire opposition has only one agenda to oust PM Narendra Modi from power. All opposition parties have united for their personal gain," said Gaurav. On her decision to join BJP, Priyanka said: "PM Narendra Modi is the only person who can lead India to the path of prosperity."...