The biggest, most lucrative lobbying firms in Washington are bipartisan.
Corporate lobbyists won big under the Treasury Department's rules and regulations to implement the bill.
NYU finance professor Thomas Philippon argues that U.S. markets are no longer as free and competitive as they were a few decades ago.
Some argue Congressional recess is when the real work gets done, when lobbying groups pull out all the stops to get policies passed.
An exodus of lawmakers means tough competition for lobbying jobs.
The companies that still donate are also becoming more transparent.
A couple hundred business owners push for the federal legalization of marijuana so their companies can grow.
The National Rifle Association spent about $5 million lobbying Congress last year. That’s up from around $1.5 million 10 years ago, according to the Center for Responsive Politics. But the NRA is not just a Washington lobbying powerhouse. Its reach extends across the country. Click the audio player above for the full story.
Google, Apple, Microsoft and others have loudly denounced Trump's immigration policy, but their lobbying reports tell a different story.