A renowned Supreme Court litigator, he argued the Republican side in Bush v. Gore, but later championed gay rights and undocumented children.

WASHINGTON — Theodore B. Olson, the conservative attorney who helped win the right to gay marriage in California, died Wednesday at age 84. Olson was a good-spirited and gracious advocate who won landmark conservative rulings from the Supreme Court.

Theodore Olson, the iconoclastic appellate lawyer behind George W. Bush’s victory before the Supreme Court in 2000, died on Wednesday. He was 84.

Prominent conservative attorney Theodore Olson, who argued the 2000 Florida vote-recount case on behalf of President George W. Bush, has died at 84.

Former Solicitor General Theodore Olson, the conservative lawyer who argued the Bush 2000 recount case, has died at 84. Olson also served as private counsel to former President Ronald Reagan.

A legal luminary of the right, Mr. Olson frustrated social conservatives in his legal fights supporting same-sex marriage and the children of undocumented immigrants.

Theodore Olson, a conservative lawyer who helped George W. Bush secure the White House and later worked to overturn California’s ban on same-sex marriage, died November 13.

Theodore Olson, 84, best known as the attorney taking the Republican side in Bush v. Gore, has died. The opposing attorney in the case was David Boies. After the decision, Olson and Boies worked together to defend LGBTQ rights.

Former U.S. Solicitor General Ted Olson, who served two Republican presidents as one of the country’s best known conservative lawyers and successfully argued on behalf of same-sex marriage, has died

Former U.S. Solicitor General Ted Olson, one of the country's best-known conservative lawyers who served two Republican presidents and successfully argued on behalf of same-sex marriage, died Wednesday.