The 15 richest US politicians in office

2. Sen. Mark Warner, Virginia

Mark Warner made his fortune investing in telecommunications companies.

3. Rep. John Delaney, Maryland

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.