The Punjab Congress had yesterday suffered a major setback when its firebrand leader and former MLA from Bholath, Sukhpal Khaira, joined the AAP in the presence of its senior leaders Sanjay Singh, in-charge of Punjab affairs and MP Bhagwant Mann.br br Twenty-one Aam Aadmi Party (AAP) workers from Sangrur joined the Congress Party in the presence of Captain Amarinder Singh on Saturday. Along with 21 AAP members, 34 SGPC members and SAD supporters also joined Congress.