I think to do this project, you must focus on one element in the story -- take a specific scene to have a song about because there isn't really a song that could capture all of that.
So you have choices, break down the story into sections:
I think you should use Eye of The Tiger by Survivor -- might be a bit before your time, but it would be a good fit for the Animal/campaign part -- The song quotes :
"It's the eye of the tiger" -- animals, even though the song isn't literally about animals, it compares the person to a tiger
"It's the thrill of the fight, rising up to the challenge of our rivals" -- Jo donna is her rival and Liz is going to keep trying to win the campaign even though she has no one to help her
The song depicts how Liz is going to keep moving forward in the campaign regardless of what happens. Good luck! :)