Former Union minister Birender Singh and his ex-MLA wife Prem Lata joined the Congress on Tuesday, a decade after quitting the party. Their joining comes a month after their son Brijendra Singh joined the party after quitting the Congress. Birender Singh (78) is the maternal grandson of the farmer leader Sir Chhotu Ram and had quit the Congress in 2014 to join the BJP. He was Union minister for steel in the first government led by Prime Minister Narendra Modi. He also held the charge of rural development, panchayati raj, and drinking water and sanitation. On his return to the Congress, Birender Singh said, "It is not just my 'ghar wapsi' but also 'vichar wapsi'." Welcoming Birender Singh and Prem Lata into the Congress, party leader Mukul Wasnik said, "With their joining, I am sure the Congress will be strengthened in Haryana and help form the Congress government in the state." Former Haryana chief minister Bhupinder Singh Hooda said, "With his (Birender Singh) rejoining, he has