"Youths from all parts of the country are getting attracted towards Modi...They are positively impacted by the Gujarat chief minister," Rao, who represents Guntur Lok Sabha seat, told reporters here.
Rao said he had decided to resign as an MP and also from primary membership of Congress in protest against the bifurcation of Andhra Pradesh.
"If BJP changes its stand and supports the unified Andhra Pradesh, definitely it will win 10 Lok Sabha seats in Seemandhra region which has 13 districts," Rao said.
Seemandhra, comprising Rayalaseema and Coastal Andhra regions, has been on boil ever since the Congress Working Committee accepted the proposal to split Andhra Pradesh in July.
BJP, said to be a fringe player in Andhra politics, has always supported the division of the southern state.
Rao revealed that Congress was expecting support from BJP in getting the Telangana formation bill passed in Parliament. The senior leader, who is on his way out of party over creation of Telangana, alleged Congress was "dividing Telugu people".