Rajasekhar, 63, was suffering from a kidney problem for the past few months and was admitted to a private hospital in Hyderabad a few days ago.
He was discharged from the hospital two days ago but he suddenly got a heart attack this morning and died.
His body was brought to Vijayawada in the afternoon. The cremation will take place tomorrow.
Nehru began his political career as a student union leader and founded the United Students Organisation.
An ardent admirer of Telugu Desam Party founder N T Rama Rao, Nehru joined the TDP at its inception in 1982 and became an MLA in 1983.
He was made the Education Minister in the NTR Cabinet in 1994.
He remained a close confidant of NTR till his demise in January 1996.
In 1997, Nehru joined the Congress and for the first time lost the 1999 election.
He was again elected as an MLA from Kankipadu in 2004 but lost the 2009 and 2014 elections.
In September last year, he returned to the TDP.
Chief Minister N Chandrababu Naidu condoled Nehru's death and termed it a "personal loss."
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