Anu Narayanswamy contributed to this report.
Correction: Previous versions of this graphic included incorrect data from the Center for Responsive Politics. It’s been updated with data directly from the Federal Election Commission.
About this story
NRA contribution data is from the 1998 through 2018 Congressional cycles and does not include individual expenditures or communication costs.
Contribution data to Congress comes from the Federal Election Commission. Congress member list comes from the @unitedstates project.
Originally published June 12, 2016.