Rep. Ron Paul is not seeking another term in Congress in order to focus on his presidential bid.

As Rep. Ron Paul continues in the race for the Republican nomination for president, another race is taking place to determine who will be the Republican nominee to replace Paul in the Fourteenth Congressional District in Texas. A dozen candidates have filed for the Republican primary, but so far four of them lead the field in fundraising.

According to Center for Responsive Politics data, Jay Old leads all of the candidates with more than $430,000 in campaign contributions including nearly $50,000 in self financing. Old, who graduated from Texas A&M University and went to law school at Texas Tech University, is a defense attorney for doctors, hospitals, building contractors, and others. The largest single contributor to Old’s campaign is employees of Modern Group, which is an industrial distributor with interests in material handling, industrial distribution and services, power generation and construction.

Randy Weber has self financed his campaign more than any other candidate, contributing more than $102,000 to his campaign so far. In total Weber has raised over $313,000, which is the second most in the campaign. Elected to the Texas State House of Representatives in 2008, Weber was reelected in 2010 to represent District 29 which includes much of Matagoria and Brazoria counties. Weber, who is the founder and owner of Weber’s Air & Heat, has received more campaign contributions from lawyers and law firms than any other profession, collecting more than $14,000.

Former Perry-appointed Texas State University System regent, Michael Truncale, has so far raised nearly $270,000 in campaign contributions. With a degree from Lamar University in Beaumont and a law degree from the University of North Texas, he also served as a member of the State Republican Executive Committee. Fellow lawyers and law firms have contributed heavily to his campaign, donating more than $24,000. Truncale has received over $37,000 from those in the health care industry, more than any other candidate.

Felicia Harris, a Texas A&M graduate, has given to her own campaign more than individual contributors have. Of the $161,000 Harris has raised, $100,000 has come from self financing, representing 62% of the total. The South Texas College of Law graduate has received more contributions from lawyers and law firms than any other industry, as they have contributed over $13,000.

While the top four candidates in campaign cash have raised more than $1.1 million combined, the other eight candidates in the race have raised a total of just over $67,000. Nearly all of the campaign contributions have come from within the state, as just $9,000 in contributions have come from outside Texas. Unlike the U.S. senate campaign, no outside expenditure groups have spent money in the district so far.