In a setback to the Congress ahead of the Lok Sabha polls, senior party leader from Punjab and MLA Raj Kumar Chabbewal on Friday quit the party and joined the ruling Aam Aadmi Party. The 54-year-old Chabbewal quit as a legislator from the Chabbewal assembly constituency in the Hoshiarpur district. He was also the Deputy Leader of Opposition in the Punjab Assembly. The prominent Dalit leader joined the AAP here and was welcomed into the party fold by Chief Minister Bhagwant Mann. Chabbewal is the second Congress leader from Punjab to join the AAP within a week. Gurpreet Singh GP, a former Congress MLA from Bassi Pathana, had recently joined the AAP. The AAP, which named its candidates for eight of the 13 Lok Sabha seats on Thursday, is likely to field him from the Hoshiarpur reserved parliamentary constituency. Speaking to reporters here in the presence of Punjab ministers Harpal Singh Cheema and Gurmeet Singh Meet Hayer, Chabbewal said he is impressed with the pro-people policies