As Maine goes, so goes the nation

Okay kiddo, let's say that Maine is like a big leader in something called politics, which is all about making decisions and running things in our country. People think that if something happens in Maine, it might happen in other states too. That's why they say "As Maine goes, so goes the nation." It's like when your teacher is the leader of the class and the other kids follow what she does. Does that make sense, little one?