Bancroft PLLC is an American

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

 law firm

Law firm

A law firm is a business entity formed by one or more lawyers to engage in the practice of law. The primary service rendered by a law firm is to advise clients about their legal rights and responsibilities, and to represent clients in civil or criminal cases, business transactions, and other...

 headquartered in Washington, D.C.

Washington, D.C.

Washington, D.C., formally the District of Columbia and commonly referred to as Washington, "the District", or simply D.C., is the capital of the United States. On July 16, 1790, the United States Congress approved the creation of a permanent national capital as permitted by the U.S. Constitution....

. Viet D. Dinh

Viet D. Dinh

Viet D. Dinh is a lawyer and a conservative legal scholar who served as an Assistant Attorney General of the United States from 2001 to 2003, under the presidency of George W. Bush. Born in Saigon, in the former South Vietnam, he was the chief architect of the USA PATRIOT Act.-Early life:Dinh was...

 is the firm's principal. The firm specializes in appellate litigation, government investigations, national security law, and corporate governance.

Dinh is perhaps best known for his involvement in designing the controversial USA PATRIOT Act

USA PATRIOT Act

The USA PATRIOT Act is an Act of the U.S. Congress that was signed into law by President George W. Bush on October 26, 2001...

 while serving as an Assistant Attorney General

United States Assistant Attorney General

Many of the divisions and offices of the United States Department of Justice are headed by an Assistant Attorney General.The President of the United States appoints individuals to the position of Assistant Attorney General with the advice and consent of the Senate...

 in the administration of George W. Bush.

In April 2011 Paul Clement

Paul Clement

Paul Drew Clement is a former United States Solicitor General and current Georgetown University legal professor. He is also an adjunct professor at New York University School of Law. He was nominated by President George W...

 joined the firm after resigning from King & Spalding

King & Spalding

King & Spalding LLP is an American law firm with 125 years of service. It was founded in Atlanta, Georgia in 1885 by Alexander C. King and Jack Spalding. The firm has expanded nationally, with offices in Austin, Charlotte, Houston, New York, San Francisco, Silicon Valley, and Washington, D.C...

, after that firm dropped the case of defending the Defense of Marriage Act

Defense of Marriage Act

The Defense of Marriage Act is a United States federal law whereby the federal government defines marriage as a legal union between one man and one woman. Under the law, no U.S. state may be required to recognize as a marriage a same-sex relationship considered a marriage in another state...

. Clement will now defend the Defense of Marriage Act

Defense of Marriage Act

The Defense of Marriage Act is a United States federal law whereby the federal government defines marriage as a legal union between one man and one woman. Under the law, no U.S. state may be required to recognize as a marriage a same-sex relationship considered a marriage in another state...

, which defines marriage in federal law as the union between one man and one woman, with Bancroft PLLC.