I bet all my reputation points with you that Chiam or his woman contest PP, SPP will poll high enough there to get a NCMP seat.
It will be Lina contesting PP. Chiam will not risk the disgrace of being offered NCMP after so many years as a full-fledged MP. I don't think he will lose, but it will be 50-50 scenario -- too risky for an aged gentleman like him to handle.