Following the historic victory of the opposition coalition Pakatan Harapan, Najib was successfully ousted from the incumbent prime ministerial seat.
Mahathir hoped to be sworn in as the new prime minister by 5 pm.

Concerns for a smooth power transition emerged as Najib, although admitting the defeat of his party and coalition during a press conference at 11 am, declared that no party has achieved a simple majority win (due to the fact that the opposing coalition were competing as allied individual parties, and was not successfully registered as a single unit by the Electoral Committee, who was believed to be under Najib's heavy influence during his power), thus leaving the appointment of the office to the hands of the Yang di-Pertuan Agong.
Nevertheless, the National Palace of Malaysia had promptly issued a royal statement, confirming Mahathir Mohamad will be sworn in as the prime minister at 9:30 pm, on the same day (10 May 2018), and had strongly refuted any claims of delaying the appointment.
At 10 pm, Mahathir was officially sworn in as prime minister.

Mahathir became the oldest currently serving state leader in the world (aged 92 years, 304 days at the time).
As proposed in the original plan of Pakatan Harapan, Wan Azizah ran as his deputy, and therefore became the first female deputy prime minister of Malaysia.
Following his appointment as prime minister, Mahathir promised to "restore the rule of law", and would make elaborate and transparent investigations on the 1Malaysia Development Berhad scandal possibly perpetrated by the ex-prime minister, as Mahathir told the press that if Najib has done something wrong, he would face the consequences.
Following the historic victory of the opposition coalition Pakatan Harapan, Najib was successfully ousted from the incumbent prime ministerial seat. Mahathir hoped to be sworn in as the new prime minister by 5 pm.
Concerns for a smooth power transition emerged as Najib, although admitting the defeat of his party and coalition during a press conference at 11 am, declared that no party has achieved a simple majority win (due to the fact that the opposing coalition were competing as allied individual parties, and was not successfully registered as a single unit by the Electoral Committee, who was believed to be under Najib's heavy influence during his power), thus leaving the appointment of the office to the hands of the Yang di-Pertuan Agong. Nevertheless, the National Palace of Malaysia had promptly issued a royal statement, confirming Mahathir Mohamad will be sworn in as the prime minister at 9:30 pm, on the same day (10 May 2018), and had strongly refuted any claims of delaying the appointment. At 10 pm, Mahathir was officially sworn in as prime minister.
Mahathir became the oldest currently serving state leader in the world (aged 92 years, 304 days at the time). As proposed in the original plan of Pakatan Harapan, Wan Azizah ran as his deputy, and therefore became the first female deputy prime minister of Malaysia. Following his appointment as prime minister, Mahathir promised to "restore the rule of law", and would make elaborate and transparent investigations on the 1Malaysia Development Berhad scandal possibly perpetrated by the ex-prime minister, as Mahathir told the press that if Najib has done something wrong, he would face the consequences.
Mahathir Mohamad