1. Rep. Vern Buchanan, Florida
Net worth: $74 million
Buchanan made his fortune buying car dealerships, reinsurance companies, and charter jet and yacht leasing businesses.
2. Sen. Mark Warner, Virginia
New worth: $90 million
Mark Warner made his fortune investing in telecommunications companies.
3. Rep. John Delaney, Maryland
Net worth: $93 million
John Delaney made his fortune creating and running a small medical services company and HealthCare Financial Partners, which finances small health care businesses. He is retiring from the House at the end of this term to run for president in 2020.
4. Rep. Michael McCaul, Texas
Net worth: $113 million
Michael McCaul made his fortune by marrying the daughter of Lowry Mays, the founder and former CEO of Clear Channel Communications.
5. Rep. Dave Trott, Michigan
Net worth: $119 million
Trott made his fortune in the home foreclosure business. He is retiring from the House at the end of this term.
6. Rep. Jared Polis, Colorado
Net worth: $123 million
Polis made his fortune founding a web-hosting company and co-founding an electronic greeting card company.
7. Rep. Greg Gianforte, Montana
Net worth: $136 million
Greg Gianforte made his fortune by creating Brightwork Development, a software company which he sold to McAfee Associates for $10 million, and RightNow Technologies, a cloud-based customer service software business that he sold to Oracle for $1.5 billion.
8. Gov. Rick Scott, Florida
Net worth: $149 million
Scott made his fortune as a healthcare executive. He is running for US Senate later this year.
9. Rep. Darrell Issa, California
Net worth: $283 million
Issa made his fortune selling car alarms. He is retiring at the end of this term.
10. Gov. Bruce Rauner, Illinois
Net worth: Just under $1 billion
Rauner made his fortune as a private equity investor.
11. Gov. Mark Dayton, Minnesota
Net worth: $1.6 billion (family wealth)
Mark Dayton's great-grandfather founded Dayton Dry Goods, which later became Target, now the fifth largest retailer in the world.
12. Gov. Jim Justice, West Virginia
Net worth: $1.72 billion
Jim Justice II inherited his $1.72 billion wealth and coal business from his father.
13. Gov. Pete Ricketts, Nebraska
Net worth: $1.9 billion
Ricketts' father is Ameritrade founder Joe Ricketts (estimated net worth: $2.4 billion), whose company acquired TD Waterhouse and renamed itself TD Ameritrade.
14. Gov. Bill Haslam, Tennessee
Net worth: $2.3 billion
Haslam's wealth comes from his family's truck-stop company, Pilot Flying J, which was founded by his father.
15. Pres. Donald Trump
Net worth: $3.1 billion
Trump inherited his father's real estate company and has developed buildings, golf courses, and hotels all over the world. He's also made money in television and has licensed his name to properties and products worldwide.