Pakatan Harapan chairperson Dr Mahathir Mohamad's endorsement of his former protégé Anwar Ibrahim leaves many questions unanswered, said Prime Minister Najib Abdul Razak.

He said people are now wondering if Mahathir still stands by his accusations against Anwar when the latter was sacked as deputy prime minister in 1998.

"(Mahathir) accused Anwar of committing acts against the order of nature (sodomy), and said Anwar had no morals and was not fit to lead the country.

"So the question in people's minds now is whether the accusation was wrong the from the beginning, or he is willing to sacrifice this principle for political ends, or there is some other trickery. All these he did not answer.

"As long as he does not answer, that means people would have doubts on this political drama that has no sincerity," Najib told reporters after attending Umno's open house at the Putra World Trade Centre today...