This is morbid but one of my favorite “butterfly” effect news stories in the last year was around the death of Angela Chao after she backed her car into a pond while intoxicated.

Okay, so - here’s the setup:
The Chao family is a very wealthy family. In the 1960’s the family patriarch got into the shipping business and has done very well, garnering money and power. Wealth and power beget wealth and power. Mitch McConnell is even married to one of the daughters - Elaine Chao.
Well, Bush appointed E. Chao to Labor Secretary during his presidency. Mind you, she’s not just Mitch’s wife - she has been in government since the late 80’s. One of the talking points in republican circles during the Bush years was that there was a massive decrease in worker safety complaints. They attributed this to businesses behaving themselves and say that this is evidence that self-regulation can work. What was learned later is that OSHA simply didn’t enforce many regulations or follow up on many complaints, instead choosing to focus on trying to find fraud within unions.
Cut to Trump. He appoints Elaine - still Mitch McConnell’s wife, and daughter of a transportation magnate - to be the Department of Transportation’s Secretary. The ethics concerns notwithstanding, the department hand waved many things through, such as the tesla doors mentioned in the article above, as well as the Tesla Model X’s confusing forward/reverse system, which is cited as being a reason for the death of Angela Chao, her sister.