It's an old cliché in politics to "follow the money." Unfortunately, it's almost always true when it comes to the support of controversial bills. In fact, all you need is $100k per senator to buy support for PIPA, the Senates version of SOPA.
It's a small price to pay for controlling how the Internet works in the United States. If you're still unsure what exactly SOPA is, check out our comprehensive article on the bill. Above are the senators that received in excess in $100,000 in campaign contributions from the Movie, Music, and TV industry. Oh hey, they all support PIPA. These numbers were compiled by ProPubilca.