A medical doctor by training, Mahathir led Malaysia from 1981 to 2003 and is dubbed the country's "father of modernization." A shrewd politician, he won five consecutive general elections, while deflecting challenges to his leadership of the United Malays National Organization (UMNO), a core component party of the ruling coalition, the Barisan Nasional (BN).

The Malaysian elections must be held by August this year, with analysts predicting they will happen by June. It promises an unprecedented spectacle as it will pit incumbent Najib Razak against Mahathir, his former mentor, who had favored him and helped install him as PM in 2009. Mahathir quit UMNO in 2016 following the 1MDB scandal, saying it had become "Najib's party."

Called a "dictator" by critics for his hard stance on dissidents and the press, and for curbing the power of the judiciary while he was PM, he attended a Bersih ("Clean") rally in 2016 organized by several NGOs seeking reforms of the current electoral system to ensure free, clean and fair elections. Critics also blame him for consolidating power in the hands of the executive during his tenure.

Mahathir set up a new party in 2016, which then joined forces with Pakatan Harapan, a loose coalition of oppostion parties. Ironically, he had locked away some members of these parties before, most significantly, his former deputy, Anwar Ibrahim. The coalition has stated that if it wins the 2018 elections, Mahathir would be PM and Anwar's wife, Wan Azizah Wan Ismail (pictured here), his deputy.

Anwar (L), once Mahathir's heir apparent-turned-archrival, was sacked from his post as deputy PM, and later charged and found guilty of graft and sodomy. Yet, in their shared zeal to unseat Najib, they've now struck a deal, with Mahathir offering to secure a royal pardon for Anwar (currently serving a second sentence for sodomy under Najib's administration), easing the way for Anwar to become PM.

Not all Malaysians are on board with this pact though. Some civil society members and opposition lawmakers blame Mahathir for engineering the very system he now opposes. This disquiet has spurred a new movement. #UndiRosak (or #SpoiltVote) that urges voters to either boycott the polls or cast spoilt ballots. But others argue that this will merely split opposition votes and empower BN further.

Current PM Najib Razak's administration has been mired in scandals, most notably involving the state fund 1MDB, which is being probed for money laundering in several countries. However, a survey in December predicted that he is likely to remain in power given a fractious opposition and his government's efforts to redraw electoral boundaries that critics claim highly favor a BN win.

The BN, which has governed Malaysia since independence in 1957, lost its two-thirds parliamentary majority after the 2013 elections. It also then lost the popular vote for the first time in its history to Pakatan Harapan.

Meanwhile, the nonagenarian has taken to social media in a bid to court the country's younger electorate. But a poll conducted in August 2017 found that "seven out of 10 voters below the age of 30 in Peninsular Malaysia do not care about politics; two-thirds believe that politicians were not just untrustworthy, but also the 'main problem in Malaysia.'"