“Yashpal has just tendered resignation from the post of Uttarakhand cabinet minister,” said Congress leader Randeep Surjewala.
Yashpal Arya and his son, along with their supporters, joined the Congress in the presence of senior party leaders Harish Rawat, K C Venugopal and Randeep Surjewala in New Delhi.
Earlier in the day, they met former Congress president Rahul Gandhi at his residence.
From 2007 to 2014, Yashpal Arya was the president of Uttarakhand Congress and had been a former speaker and a minister in the Congress government led by Rawat.
He had switched over to the BJP in 2017 ahead of the assembly elections in Uttarakhand. He represents the Mukteshwar assembly constituency in the state.
His son Sanjeev Arya represents the Nainital Assembly constituency in Uttarakhand.