Marumalarchi Dravida Munnetra Kazhagam chief Vaiko on Sunday announced his party's support to the Dravida Munnetra Kazhagam in the R K Nagar assembly bypoll scheduled on December 21, the first such gesture after over a decade.
After a high-level party meet in Chennai, Vaiko said his party has unanimously decided to support the DMK in the by-election.
"It is a well thought-out decision considering the interests of Tamil Nadu and the Dravidian movement," he told reporters.
Asked if the alliance will continue, he said, "This can be taken as a starting point" in view of the cordial atmosphere between the two parties.
Vaiko further said, "There is a need to teach a lesson to the All India Anan Dravida Munnetra Kazhagam regime which has lost the trust of the people."
He hit out at the BJP-led centre over "Hindutva and weakening federalism" besides lashing out at the ruling party for hobnobbing with the saffron party.
DMK working president M K Stalin welcomed the decision, saying when all opposition parties were joining hands with it to end "this horse-trading regime," the MDMK has done its part.
he MDMK's decision to support the DMK comes after recent meetings between Vaiko and DMK working president M K Stalin.
Also, Vaiko recently had met DMK chief and former mentor M Karunanidhi at the latter's Gopalapuram residence.
Karunanidhi, who was ill for about a year and confined to his residence is now recuperating following treatment.
The MDMK, which was part of the DMK-led alliance in Tamil Nadu, parted ways from it to support late J Jayalalithaa-led AIADMK in the 2006 assembly election.
Vaiko had been detained under the now defunct Prevention of Terrorism Act by the then AIADMK regime in July 2002. After spending about 19 months in prison, he was released in February 2004.
He was arrested for allegedly making pro-Liberation Tigers of Tamil Eelam speeches. The Vaiko-led party had last fought the 2004 Parliamentary election in the DMK-led front.
In 2014, the MDMK was part of the BJP-led front whereas in 2011 the party quit the AIADMK-led alliance and also boycotted the Assembly election that year.
The MDMK fought the 2016 Assembly election as part of the People's Welfare Front, projected as an alternative to the two Dravidian majors, the AIADMK and the DMK.
In December 2016, the Vaiko-led party quit the combine which drew a blank.
The PWF comprised actor-turned politician Vijayakanth's Desiya Murpokku Dravida Kazhagam, the Marumalarchi Dravida Munnetra Kazhagam, the Communist Party of India, the Communist Party of India-Marxist, Viduthalai Chiruthaigal Katchi, and former Union minister GK Vasan's Tamil Maanila Congress.
In R K Nagar, DMK's N Marudu Ganesh is pitted against E Madusudanan of the ruling mainstream AIADMK.
Rival AIADMK leader TTV Dinakaran is also in the fray.
The BJP has announced fielding its senior functionary Karu Nagarajan.
The DMK's allies the Congress and the Indian Union Muslim League have already extended their support to the main opposition party.
Besides, parties including the CPI, the CPI(M) and Viduthalai Chiruthaigal Katchi have declared their support to the DMK.