 On May 12, 2010, two days after the 2010 general election and a month before President Gloria Macapagal Arroyo's term expired, Corona was appointed the 23rd Chief Justice of the Supreme Court of the Philippines, succeeding Reynato Puno who had reached the mandatory age of retirement.His appointment was highly criticized, notably by then presidential candidate Benigno Aquino III and former President Fidel V. Ramos, due to a constitutional prohibition against Arroyo from making appointments two months before the election up to the end of her term.Before being elected president, Aquino said that he will not recognize any chief justice appointment that will be made by the Arroyo administration, and mentioned impeachment as an option to remove him by saying "The legislature has the power of impeachment if they feel there are grounds to impeach an impeachable constitutional body.