Former Union Minister A Sai Pratap on Thursdaythe ruling Telugu Desam Party (TDP) in Andhra Pradesh.
He was formally admitted into the party by TDP president N Chandrababu Naidu.
As a Congress leader, Sai Pratap had served as a member of Parliament for six terms from Rajampet Lok Sabha constituency in Kadapa district.
He was a close friend of former Chief Minister YS Rajasekhara Reddy who too belonged to Kadapa district.
Sai Pratap was the Union Minister of State for Steel in the UPA 2 government headed by Manmohan Singh.
He quit the Congress in 2014 protesting the bifurcation of AP.
He stayed away from politics after quitting Congress.