Former Attorney General Theodore Olson, the conservative lawyer who argued Bush's 2000 recount case, has died at age 84

Theodore Olson, the former conservative lawyer who argued on behalf of President George W. Bush in the Florida vote recount case in 2000, has died at age 84, his law firm announced Wednesday.

No immediate cause of death was given for the former attorney general, who is also known for teaming with David Boies – his opponent in Bush v. Gore – to help overturn California's Proposition 8 banning same-sex marriage.

“Ted was a titan of the legal profession and one of the most extraordinary and eloquent advocates of our time,” Barbara Becker, chairman and managing partner of Gibson Dunn, said in a statement. “He was creative, principled and fearless – a groundbreaking advocate who cared about all people. We deeply mourn his loss and extend our condolences to his wife Lady, a valued member of our close family, and to all of Ted's loved ones.”

The firm said that over the course of his career, Olson “tried 65 cases before the Supreme Court, including the two Bush v. Gore cases arising from the 2000 presidential election; Citizens United v. Federal Election Commission; Hollingsworth v. Perry, the case was affirmed,” repealing California’s Proposition 8, which bans same-sex marriage; and the U.S. Department of Homeland Security v. Regents of the University of California, successfully challenging the Trump administration's repeal of the Deferred Action for Childhood Arrivals (DACA) program.

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“Ted's arguments before the Supreme Court included cases involving separation of powers, federalism, voting rights, the First Amendment, the Equal Protection and Due Process Clauses, patents and copyrights, antitrust, taxes, property rights, punitive damages, the Commerce Clause, immigration and criminal law , securities, Internet and other constitutional and statutory issues,” the firm said.

According to Gibson Dunn, Olson was an assistant attorney general at the Justice Department between 1981 and 1984 in charge of the Office of Legal Counsel. He later served as U.S. attorney general between 2001 and 2004, during Bush's first term.

In addition to these federal roles, Olson served as a private adviser to Bush and former President Ronald Reagan.

Since 2009, Olson has served on the Board of Trustees of the Ronald Reagan Presidential Foundation and Institute.

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Former President George W. Bush, former First Lady Laura Bush and Theodore Olson, second from left, who lost his wife during the September 11, 2001 terrorist attacks on the Pentagon, attend a moment of silence on September 11, 2004 on the South Lawn of the White House. (Brendan Smialowski/AFP via Getty Images)

“His wisdom, openness and helpfulness – no matter how busy he was – made him an invaluable member of the Foundation and Institute’s Board of Trustees,” said Fred Ryan, the board chairman, in a statement obtained by Fox News Digital on Wednesday.

“Ted Olson wasn't just President Reagan's lawyer – he was his friend and confidant, and that friendship and bond only grew stronger after Ronald Reagan left office,” Ryan also said. “The President often praised him for keeping his spirits up during difficult times, and President and Mrs. Reagan tried to return the favor when Mr. Olson lost his.” [former] Ms. Barbara, who was aboard the hijacked plane that crashed into the Pentagon on September 11, 2001.

Gibson Dunn added that Olson “has twice been awarded the U.S. Department of Justice's Edmund J. Randolph Award, the highest honor for public service and leadership, and also the Department of Defense's Distinguished Service Award, the highest civilian honor, for his advocacy.” in the…”Courts of the United States, including the Supreme Court.”

Former President Ronald Reagan (left) and Ted Olson. The Ronald Reagan Presidential Foundation and Institute described Olson as an “invaluable member of the Foundation and Institute Board of Trustees.” (Ronald Reagan Presidential Foundation and Institute)

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According to the Washington Post, Gibson died at a hospital in Falls Church, Virginia.