Vaiko-led People's Welfare Front on Wednesday continued to woo Tamil Maanila Congress leader G K Vasan for an alliance, saying the invitation issued to the former Union Minister for a poll-pact "stays."

"The invitation (issued earlier) stays. But they have to decide,"CPI(M) state Secretary G Ramakrishnan told reporters in Chennai in response to a question in this regard.

CPI(M), besides CPI and VCK, is part of the four-party PWF, led by MDMK founder Vaiko.

Earlier, all PWF leaders--Vaiko, Ramakrishnan, CPI state Secretary R Mutharasan and VCK founder Thol Thirumavalavan, had called on Vasan in January, inviting him to join the coalition. Vasan, who quit Congress to resurrect his father G K Moopanar founded Tamil Maanila Congress in 2014, has, however, been weighing his options about an alliance. PWF had recently clinched a pact with actor-politician Vijayakant's DMDK to face the May 16 Assembly polls in Tamil Nadu, allotting 124 seats to it.