LUCKNOW: The Congress decision to field Priyanka Gandhi Vadra as AICC general secretary in charge of eastern UP has created a stir in the rival political camps.Political observers say Priyanka’s entry has the potential to make or mar fortunes of any political party aiming to capture power at the Centre and would force the BJP and the SP-BSP alliance to redraw their strategy.Despite the concerns within Congress that the Priyanka card could be a bit late in the day, her charisma, personality and articulation, apart from the mass appeal she could generate — more so perhaps for her resemblance to her grandmother Indira Gandhi -— could rejuvenate Congress cadres and upset caste equations of other parties.Both the regional parties, know very well that their rise and growth are linked to the decline of the Congress and Congress’ second coming in the state after having been reduced to just two seats in the 2014 Lok Sabha elections would be at the cost of their vote bank.For the SP-BSP alliance, the main challenge would be to prevent the exodus of Muslims from its camp to Congress. If Congress is able to convince Muslims, even in one-fourth of the 80 Lok Sabha seats in UP, Brahmins and Scheduled Castes would also follow.BJP faces the challenge of stemming the desertion by Brahmin-led upper-caste votes that may gravitate towards the Congress. The BJP has already played up the 10% reservation for poor upper castes but this move may offset its dreams to an extent.Holding on to the sulking upper caste in UP is a big challenge that BJP faces right now.But on Wednesday, BJP was quick to dismiss Priyanka’s entry as a sign that the grand old party was not confident about Rahul’s leadership as party chief. BSP, which has openly snubbed Congress while announcing its tie-up with SP at a press conference in Lucknow, however, did not react.Samajwadi Party, which was in an alliance with Congress in the 2017 assembly polls, described the development as Congress’s internal matter. It was Priyanka who had played a stellar role in sealing the deal then. “It is a democracy and every party is entitled to appoint leaders of their choice,” said SP spokesperson Udaiveer Singh.