Duterte's 2016 presidential campaign led to his election victory. During his presidency, his domestic policy has focused on combating the illegal drug trade by initiating the controversial war on drugs, fighting crime, and corruption, launching a massive infrastructure plan and a proposed shift to a federal system of government. He also oversaw the controversial burial of Ferdinand Marcos, and directed the government to victory in the 2017 battle of Marawi over the Maute group, and subsequent rehabilitation of the region. From 2020, he has led the government's response to the COVID-19 pandemic. He declared the intention to pursue an "independent foreign policy", and strengthened relations with China and Russia. In August 2021, he announced his candidacy for vice president in the 2022 election.