Alagiri, son of party President M Karunanidhi, was referring to expulsion of Vaiko from DMK over two decades ago on the charge of anti-party activites and his own dismissal.
Addressing his supporters at Villor in Virudhunagar constituency, he said Vaiko met him and sought his support.
"Vaiko and me were meted out same injustice. He is a people's servant...A much better servant than others and people know about him," the former DMK south zone organising secretary said.
Alagiri said Vaiko would defenitely raise his voice for the people in Parliament.
Alagiri, who is cut up with the choice of several DMK candidates, has been campaigning agaisnt them and asking his supporters to ensure the party finished third in the April 24 polls.