J. Scott Applewhite/AP/File
8. Sen. Frank Lautenberg (D) – N.J.
Minimum net worth: $56.8 million
Lautenberg's minimum net worth rose about $2 million in 2011, to $56.8 million.
The New Jersey senator co-founded Automatic Data Processing, the payroll processing company known as ADP, and received retirement income from the company of almost $185,000 during the period covered by his most recent filing.
Lautenberg and his wife, Bonnie Englebardt, have extensive real estate holdings.
There is a condo in Vail, Colo., with a reported value of $500,000 to $1 million as well as commercial real estate in Norwalk, Conn., and Sunrise, Fla., worth at least $1 million combined. And Englebardt has at least 12 real estate investments valued at $1 million or more.
Since a senator's spousal assets worth more than $1 million fall into a broad category of "over $1 million," Lautenberg's true minimum net worth could be far greater than reported.
Lautenberg also has two blind trusts: one valued at $5 million to $25 million and the other at $1 million to $5 million.
He reported at least $1.75 million in liabilities, including mortgages on two personal residences of at least $1.25 million combined.