For the last few weeks, there has been a debate going on in Pakistan that if the USA has been discretely trying to topple Imran Khan's government. In an Urdu speech, a government spokesperson said that the US ambassador to Pakistan called on the opposition leaders and justice in the Lahore High court while Imran Khan was visiting Russia for gas pipeline negotiations.
He also said that the US embassy also supplied funding for horsetrading.
However, my question is - Who was the last head of state/government that CIA tried to topple either with success or without success?
Please, provide an authoritative reference.