He had been missing from the TDP circles over a period of time.
Mr Rao showed emotions during his speech in Khammam district.
The sources say that Mr Rao would join TRS soon. The TRS cadre had been relentlessly working on the leader to join the party. It is reported that he would become a minister and may also seal a seat in the state council as soon as he joins TRS.
There were reports spread earlier that Tummala is unhappy with Naidu as he is promoting a junior leader Nama over him in the district.