Sampath, who had differences with Vaiko, called on Jayalalithaa at her Poes Garden residence and was taken in to the party as a primary member.
The induction of Sampath, a renowned orator, into the AIADMK is expected to give a boost to the party ahead of the next Lok Sabha elections.
The rift between Vaiko and Sampath, who was also MDMK propaganda secretary, came to the fore recently when the latter attacked the MDMK Chief saying he was being sidelined by the party leadership because of his increasing popularity.
Sampath was one of the DMK old-timers who followed Vaiko when MDMK was launched.
