Farmer groups on Saturday announced a new political front to contest the Punjab Assembly polls and named it 'Samyukt Samaj Morcha'. The new party will be led by BKU (Rajewal) chief Balbir Singh Rajewal. It has been constituted with participation from 22 farmer unions that were part of the 'Samyukt Kisan Morcha' and have now broken away from it.