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The Center for Responsive Politics reveal how the Koch Bros. are using their money to fund a conservative agenda, raising and spending $400 million in just 18 months last election cycle. CNN's Tom Foreman reports.
In 2010, the Supreme Court made a historic ruling in "Citizens United," eliminating limits on how much money corporations and unions could contribute to candidates for office. Now, individual donors like Shaun McCutcheon, want the same. CNN's Joe Johns reports on McCutcheon's case before the Supreme Court that could undercut most of the remaining rules on campaign contributions.