I'm working on a story where a corrupt government official manages to blackmail his nation's government into secretly letting him and his cohorts run things from behind the scenes. This is achieved by threatening them with orbital bombardment (or at least something in that ballpark) if they don't surrender control.
My question is: "Which members of the nation's government would he need to threaten in order to get control of the country?"
This country's government is in the style of that of a western nation from earth, with a prime minister and a parliament. (Please let me know if there are other details of this this govt. that I need to be more specific about.)