While the cigarette, pharmaceutical, and insurance industries spend far more, the NRA spends nearly 10 times as much as the biggest gun control lobbying group in the country.

The NRA is especially active during presidential campaigns, contributing millions to candidates that support expanded gun rights and targeting those who threaten to control or regulate guns. In the 2016 election, the group threw its support behind President Donald Trump, and against Democratic opponent Hillary Clinton.

The NRA also contributes tens of thousands of dollars to Congressional candidates and members of both parties, though the lion's share goes to the GOP. The top 81 members of Congress with the most career NRA contributions are all Republicans.

And that has had a profound effect on how Americans view the NRA. Its influence has divided gun owners and non-gun owners.

There are also significant differences in how NRA members and non-NRA members view the same gun control policy proposals — even among Republican gun owners.