WASHINGTON — U.S. Rep. Michael McCaul, R-Austin, is the second-richest member of Congress in 2015, according to a new list released by Roll Call. 

McCaul, whose wife's father was the founder of Clear Channel Communications, has been a regular at the top of the yearly list. He is joined in the top 50 by fellow Texas Congressmen Roger Williams, R-Austin, Kenny Marchant, R-Coppell, and Lloyd Doggett, D-Austin.

On the other side, U.S. Rep. Rubén Hinojosa, D-Edinburg, was named one of Congress' poorest members.

Each year, Roll Call's reporters scour each member's financial disclosure forms to determine the "Wealth of Congress." 

Here's a look at what it found for the Texans on the richest and poorest lists. For more on Roll Call's Wealth of Congress list, read the paper's full article

The Richest 

#2 U.S. Rep. Michael McCaul, R-Austin 

Net Worth: $108 million 

How he got there: All of McCaul's assets are listed in the name of his wife Linda McCaul, the daughter of Clear Channel CEO founder Lowry Mays, or in the names of his children.  

#16 U.S. Rep. Roger Williams, R-Austin 

Net Worth: $27 million

How he got there: Williams inherited and expanded the Fort Worth-area car dealership business of his father, Jack Williams.

#31 U.S. Rep. Kenny Marchant, R-Coppell 

Net Worth: $14 million 

How he got there: Marchant was originally a real estate developer; most of his assets are tied up in investments. 

#33 U.S. Rep. Lloyd Doggett, D-Austin 

Net Worth: $13 million 

How he got there: Doggett's wealth is tied up in Travis County rental properties, retirement income from his Texas Legislature tenure and assets wrapped up in stocks and mutual funds.  

The Poorest 

#536 U.S. Rep. Ruben Hinojosa, D-Edinburg

Net Worth: -$900,000

How he got there: Roll Call writes that "a massive arbitration award exceeding $1 million against Hinojosa from a failed food business — along with tens of thousands of dollars of unpaid tax bills for that business" put Hinojosa as the sixth-poorest member.