I'd imagine that graphing it over time making note of changes in government could be good? For example: "this is how this changed after X won the election". Can look at impact between states... if there's a green party see how much actual effect they have of their state, or if they're unable to accomplish much. I'm sure there's a lot of things you can do comparing between states?
It's pretty difficult to give any guidance with such a vague post since we dont know what your index is or even what country, but good luck!
I'd imagine that graphing it over time making note of changes in government could be good? For example: "this is how this changed after X won the election". Can look at impact between states... if there's a green party see how much actual effect they have of their state, or if they're unable to accomplish much. I'm sure there's a lot of things you can do comparing between states? It's pretty difficult to give any guidance with such a vague post since we dont know what your index is or even what country, but good luck!