LIMA (Reuters) - Peru, the world’s No.2 copper producer and for years one of Latin America’s fastest growing economies, has seen a litany of presidents ousted from office or imprisoned on allegations of corruption over the past three decades.Last week, centrist Martín Vizcarra was controversially removed from office by Congress on corruption charges, and on Sunday, his successor Manuel Merino resigned after deadly protests, plunging the country into turmoil just five months before elections in April. Many observers fear the Andean country now faces a period of heightened political uncertainty with the threat of impeachment likely to hang over any future leaders’ heads. Here is the rundown: MANUEL MERINO (Nov. 10-15, 2020) The former head of Congress, who led impeachment proceedings against Vizcarra, resigned after two deaths during protests against his less-than-week-old government sparked an exodus from his cabinet and widespread calls for his removal. Lawmakers had said that they would launch impeachment proceedings against him if he did not resign. MARTÍN VIZCARRA (2018-2020) Lawmakers ousted Vizcarra after media reports alleged he had received 2.3 million soles ($640,000) in bribes from two companies that won a public works tender while he was a regional governor years earlier. Vizcarra, who had long clashed with lawmakers, strongly denied the allegations, but was voted out of office after a second impeachment trial in as many months found him “morally incapable” of governing.Kuczynski remains under house arrest while prosecutors investigate him for favoring contracts with Brazilian construction firm Odebrecht while he was a minister under former President Alejandro Toledo. Kuczynski initially denied any ties to Odebrecht. But he eventually acknowledged his consulting firm advised the builder on project financing. Kuczynski resigned from the presidency in 2018 amid pressure from Congress.Humala, retired from Peru’s military, is under investigation for allegedly receiving $3 million from Odebrecht during the 2011 presidential election campaign. Prosecutors have requested 20 years in prison, but he has yet to see his day in court. Humala denies the allegations and has said he plans to run in the 2021 presidential election.