He got the post because of CPM.He elected as a MP because he is CPM gave seat to him. So idealy he should resign from MP post as well. If he is not able to support the ideology of mr Karat & CPM.He can contest on the next time and prove peoples supports his ideology. One thing CPM lost all the credibility by supporting Mayavathi,once CPM said she is the most currupted lady. Now CPM also showing cheap political play.
