I am still trying to come up with a project that entails, in part, super PACs. Above is an update I will want to use as it goes into depth over the relationship between candidates and their involvement with super PACs.
Here is a great overview of super PACs from Vox which also looks at Citizens United as well as "dark money and the older campaign finance laws that are still around."
Here is an example of a brand new super PAC advertisement that is supporting John Kasich.
Below is my still favorite Colbert Report definition of super PAC.