It is the responsibility of every Muslim to inform the public of his marriage. I am not saying that he or she must tell the whole world, suffice to inform your relatives and friends. Why? Simply to avoid being accused of illicit sex or zina.
If the person is the leader of the community, state or nation, then he must not hide his marriage, be it for the second, third of even fourth time.
So, Prime Minister Abdullah Badawi must come forward, either to deny or confirm, his marriage to Jean Danker. Marriage is the sunnah of the Holy Prophet Muhammad S.A.W. and the Malays even describe it as "mendirikan masjid".
Let the truth prevails.