If Kalam really cares for the public and is suitalble for public life, leave alone the office of president, why doesn't he makes it explicit and contests as an MP from Chennai.
If he is really popular and public's man, people would fall over each other and vote for him.
He can then represent people in parliament and may be contest for PMship. He can throw away Italian lady then (lol).
But I know that he wouldn't contest becasue he wouldn't win. He would contest only if he is sure to win (LOL) and all other parties don't put a candidate against him (LOL).