PAP big gun in Aljunied and Hougang

Lim Boon Heng, the big gun of yesteryears, is seen in a grassroot affair
in Aljunied and Hougang, leading a team of freshies that are likely to
be the candidates for the next GE. Just my guess. The question, why Boon
Heng and not some incumbent ministers? Perhaps Boon Heng has
volunteered to throw his weight in Aljunied GRC to carry the new team to
victory. By the look of things, Boon Heng