Timeline: The Best Government Money Can Buy - A short, shady history of how American elections are bought and paid for.
So You Want to Buy an Election? If you have a ton of cash and a political agenda, it's easier than ever to make powerful friends and influence people. Here's a handy how-to guide to the complex, cash-drenched world of federal campaign finance.
The Crazily Expanding Political Money Universe: The red giants and blue dwarfs spending millions to influence the 2012 election.
If Citizens United was the Big Bang of a new era of money in politics, here's the parallel universe it formed: rapidly expanding super-PACs and nebulous 501(c) groups exerting their gravitational pull on federal elections.
Cartoon: Thomas Nast/Harpers Weekly, Wikimedia Commons