The AINRC had decided at its recent meeting to extend support to AIADMK in the by-election.
"Voters should teach an effective lesson to the Congress nominee and Chief Minister V Narayanasamy by electing the AIADMK candidate," he said.
Earlier, Rangasamy offered worship at a temple in the constituency along with the AIADMK candidate, Om Sakthi Segar.
He also alleged that the election was forced on the people, following the resignation of the Congress member A John Kumar as MLA of Nellithope.
Tamil Nadu Ministers M C Sampath, C V Shanmugham and a host of leaders from the neighbouring State, legislators belonging to the AIADMK and AINRC here were among those who were present.