It’s tax day today, and while Americans all over the country are scrambling to pay what they owe, in Washington there is a different kind of hustle taking place. About 6,500 lobbyists are busily working to make sure that their more than 2,000 client organizations can pay a little less in taxes. Some want a new tax credit passed. In this year that threatened comprehensive tax reform, many are focused on protecting existing loopholes, credits, and exemptions. To understand the vast and busy world of Washington tax lobbying, a new Sunlight Foundation analysis and visualization has mapped out the networks of tax lobbying from the 112^th Congress (2011-2012), which should also be a pretty good guide to what lobbying in the 113^th Congress will look like. Our interactive component lets you follow the industries and issues that you care most about. Graphic by Alexander Furnas and Amy Cesal. Click to explore the network interactively. The visualization draws on the complete record of tax lobbying in the 112^th Congress. For those keeping score at home, that covers:

• $773 million in reported lobbying spending
• 1,454 bills
• 2,221 organizations