Mahathir Mohamad resigns as Prime Minister of Malaysia following an attempt to replace the Pakatan Harapan government, which triggered the 2020-2022 Malaysian political crisis.

Mahathir bin Mohamad is a Malaysian politician, author and doctor who served as the fourth and seventh prime minister of Malaysia from 1981 to 2003 and again from 2018 to 2020. He was the country's longest-serving prime minister, serving for a cumulative total of 24 years. His political career has spanned more than 75 years, from joining protests opposing citizenship policies for non-Malays in the Malayan Union in the 1940s to forming the Gerakan Tanah Air coalition in 2022. During his premiership, Mahathir was granted the title "Father of Modernisation" for his pivotal role in transforming the country's economy and infrastructure. At 100 years old, he is currently the oldest living former Malaysian prime minister.

The prime minister of Malaysia is the head of government of Malaysia. The prime minister directs the executive branch of the federal government. The Yang di-Pertuan Agong appoints the prime minister who is a member of Parliament (MP) who, in his opinion, is most likely to command the confidence of a majority of MPs. The prime minister is usually the leader of the party winning the most seats in a general election.

Pakatan Harapan is a Malaysian political coalition consisting of centre-left political parties which was formed in 2015 to succeed the Pakatan Rakyat coalition. It has led a grand coalition government since November 2022, having previously led a single-coalition government from May 2018 to February 2020.

The 2020–2022 Malaysian political crisis was triggered after several Members of Parliament (MPs) of the 14th Malaysian Parliament changed party support, leading to the loss of a parliamentary majority, the collapse of two successive coalition governments and the resignation of two Prime Ministers. The political crisis culminated in a 2022 snap general election and the eventual formation of a coalition government. The crisis ended in 2022 at the federal level but continued until 2023 in the state of Sabah in what became known as the Kinabalu Move.