2018 Sri Lankan constitutional crisis

A constitutional crisis began in Sri Lanka when President Maithripala Sirisena appointed former president and member of parliament Mahinda Rajapaksa as prime minister on 26 October 2018 before formally dismissing the incumbent Ranil Wickremesinghe, resulting in two concurrent prime ministers. Wickremesinghe and the United National Party (UNP) viewed the appointment as illegal, and he refused to resign.

Source: Wikipedia — 2018 Sri Lankan constitutional crisis (CC BY-SA 4.0)