no different than what happened in russia after the fall of the soviet union . the oligarchs decide who wins the elections . they put there money and TV channels behind their perfect "yes man " and get him into office .
i read a very good book on this called "once upon a time in russia " it follows the story of boris berezovsky and later on in the book Alexander Litvinenko , boris owned a large potion ORT which was then the russian version of the BBC . he was instrumental in keeping president yeltsin in power .
at the time in russia it was going badly and people started to turn their support back to the communists , boris and his other oligarch friends managed to swing to vote back round and win yeltsin his last term in power against the odds , then he also hand picked and secured in power .,…you guessed it Vladimir putin . who they believed would be the perfect "yes man " who would do as the oligarchs told him .
they misjudged putin , who turned on all the oligarchs the moment he got in power , and completely rid the political world of them , one of the reasons putin is so well liked is because of this , he rid the russian system of huge amounts of corruption . boris and putin , went from trusted partners to enemies , boris was ran out of the country along with his parter and head of security alexander litvinenko … … he was poisoned by the russian KGB in london
https://en.wikipedia.org/wiki/Poisoning_of_Alexander_Litvinenkohttps
and boris ? he was found dead in his bathroom a few years later in an apparent suicide but his family believe putin had him killed …loose ends tied up 
its a great book i recommend you read it , its your sort of book
and i would imagine a similar situation exists to a degree (slightly less assassinations ) in the US