

It’s actually from the Cold War.
1st world = USA, NATO, and their allies. 2nd world = USSR, the Eastern Bloc and their allies (the 2nd world doesn’t really exist anymore). 3rd world = anyone not in the 1st or 2nd categories.
You are right though it’s not about any real statistics. It’s about political alignment.
To me her platform was:
The bottom two is what really did her in. Being the status quo candidate when people aren’t happy with the status quo isn’t a winning strategy. Neither is ignoring your base to pander to a group of people who will never for vote for you.