Peter Keisler

Peter Douglas Keisler is an American attorney who served as Acting United States Attorney General in 2007 during the administration of President George W. Bush. Prior to that role, he held senior positions within the Department of Justice, most notably as Assistant Attorney General for the Civil Division, and had a distinguished career as a partner at Sidley Austin in Washington, D.C. His professional trajectory includes clerkships with prominent federal judges, participation in significant litigation related to national security and civil rights, and an unsuccessful nomination to the United States Court of Appeals for the District of Columbia Circuit.

Early life and career

Keisler was born on October 13, 1960, in Hempstead, New York. He graduated from George W. Hewlett High School on Long Island in 1977 before enrolling at Yale University as an undergraduate student. While at Yale, he served as Chairman of the Party of the Right and Speaker of the Yale Political Union, demonstrating early engagement with campus political life. He completed his studies magna cum laude in 1981 and continued at Yale Law School, where he earned a Juris Doctor in 1985. During this period, Keisler co‑founded the Federalist Society in 1982, an organization that would later become influential in conservative legal circles; he also belonged to the Calliopean Society.

Following law school, Keisler clerked for Judge Robert Bork on the United States Court of Appeals for the District of Columbia Circuit from 1985 to 1986. He then joined the Office of Legal Counsel under President Ronald Reagan, where he worked on Supreme Court nominations, including the unsuccessful nomination of Bork and the successful nomination of Justice Anthony Kennedy. In 1988, Keisler served as a clerk for Justice Kennedy on the United States Supreme Court, working alongside fellow clerks such as Miguel Estrada.

After completing his clerkship, Keisler entered private practice as a partner in the Washington, D.C., office of Sidley Austin. His legal focus encompassed general and appellate litigation as well as telecommunications law. He represented clients before the U.S. Supreme Court and numerous federal courts of appeal, building a reputation for expertise in complex legal matters.

Keisler transitioned to public service on June 24, 2002, when he joined the Department of Justice as Principal Deputy Associate Attorney General and Acting Associate Attorney General. On July 1, 2003, he was sworn in as Assistant Attorney General for the Civil Division. In this capacity, Keisler defended policies of the Bush administration related to the Global War on Terror, represented the government in cases concerning access to abortion clinics, and addressed regulatory matters involving telemarketing companies.

A notable case during his tenure involved Hamdan v. Rumsfeld, where Keisler argued on behalf of the United States before the D.C. Circuit and contributed to appellate and Supreme Court briefs. He also led the team that responded to an appeal by Sabin Willett, the attorney for seventeen Uyghur detainees at Guantanamo Bay, challenging the application of the Detainee Treatment Act in relation to Combatant Status Review Tribunals.

Keisler announced his resignation from the Department of Justice on September 6, 2007, citing a desire to spend more time with family. However, President Bush announced that Keisler would remain at the department as Acting Attorney General until a new nominee was confirmed by the Senate. The same day, Bush nominated Michael Mukasey for the position of Attorney General.

Cabinet tenure

Keisler’s service as Acting United States Attorney General began on September 17, 2007, following the resignation of Attorney General Alberto Gonzales. He held this acting role until November 9, 2007, when a new Attorney General was confirmed by the Senate. During his brief tenure, Keisler oversaw the Department of Justice’s operations and continued to represent the federal government in legal matters that had been pending during the transition.

His appointment as Acting Attorney General occurred under President George W. Bush, who also nominated him for a seat on the U.S. Court of Appeals for the District of Columbia Circuit earlier that year. Although Keisler’s nomination was ultimately not acted upon by the Senate, his temporary elevation to the cabinet position underscored his standing within the administration and his experience in both civil litigation and national security law.

Legacy

Keisler’s legacy is marked by his contributions to high‑profile legal debates during a period of significant governmental transformation. His work on behalf of the Department of Justice in cases such as Hamdan v. Rumsfeld placed him at the center of discussions about executive authority, military commissions, and detainee rights. The appellate arguments he crafted helped shape the legal framework surrounding the administration’s policies related to counterterrorism.

In addition to his public service, Keisler returned to private practice in March 2008 as a partner at Sidley Austin. His continued involvement in complex litigation and appellate work reflects the breadth of experience gained during his time in government. The combination of clerkships with influential federal judges, participation in landmark Supreme Court cases, and leadership within the Department of Justice positions Keisler as a notable figure in contemporary American legal history.

While his nomination to the D.C. Circuit was not confirmed, the circumstances surrounding it illustrate the interplay between judicial appointments, partisan considerations, and professional background. The fact that he served as Acting Attorney General for a brief period further highlights the trust placed in him by the administration during a time of transition within the Department of Justice.