MONEY IS NOT SPEECH.
CORPORATIONS ARE NOT PEOPLE.

Jefferson & Madison's writings & letters to each other are a good start. You will learn of their very substantial concerns about corporate and particularly financial interests influencing government. What we are talking about here is actually a bit of unfinished business from back then.

Of particular interest is Justice Stevens' scathing dissent to the majority resolution.

One of the best authorities on the subject. On their site you will also be able to link up with Amendment activities all over the country.

A history of Fanny Mae & Freddie Mac's participation in the run up to the Great Recession. She also has a column in the NY Times Sunday Business section.

A background on historic financial collapses, among other insights