With the formal issue of notification for the April 10 elections just a week away both the coalitions are yet to give final shape to their candidates' list for the 20 seats.
The notification will be issued on March 15 and the last date for filing of nominations is March 22.
Despite being a key partner of the Left for long in the state and at the national level, RSP dealt a severe blow to CPI(M) when it decided to quit the front yesterday and put up its candidate in Kollam seat.
According political analysts, it is all the more significant that the RSP has not only pulled out of the LDF but also made it clear that it would not be averse for a tie up with the Congress-led UDF if it supports its contestant in Kollam.
Also Read
The development also came as a setback to the CPI(M)'s status as the undisputed leader of a "strong and united Left" in the country serving as the engine that propels the anti-Congress, anti- BJP alternative before and after the elections.
The development also punctured the LDF's claim of being a coherent and compact coalition unlike the UDF, whose partners often air their differences in the open.
The poll watchers see the development as a re-play of the parting of ways from the LDF by a powerful section of Janata Dal (S) led by veteran socialist M P Veerendrakumar over denial of a seat on the eve of the 2009 Lok Sabha polls, which was seen to have marred the Left's prospects in parts of the state then.