American journalist, known especially for her coverage of U.S. presidents, who broke through a number of barriers to women reporters and won great respect in her field.

Born to Lebanese immigrants, Thomas was the seventh of nine children. When she was four years old, the family moved to Detroit, Michigan. While attending high school, Thomas decided to become a journalist, finding the work to be a perfect outlet for her boundless curiosity. At Wayne State University, Detroit, she worked for the campus newspaper and, after receiving her B.A. in 1942, she moved to Washington, D.C. The following year Thomas was hired by the United Press (later called United Press International 【UPI】) to write local news for radio. She was given a regular beat at the U.S. Department of Justice in 1955, a job that would come to include coverage of Capitol Hill, the Federal Bureau of Investigation, and the Department of Health, Education, and Welfare.

Thomas's first assignment that related to the presidency—covering a vacation of president-elect John F. Kennedy (Kennedy, John F.) and his family—whetted her taste for presidential coverage, and from then on she attended presidential press conferences and briefings. She gained a reputation for asking blunt questions with an irreverent and populist flavour. In 1970 Thomas was promoted to the position of White House correspondent, and two years later she became the only print journalist to accompany President Richard Nixon (Nixon, Richard M.) on his historic trip to China. Not long afterward, the Watergate Scandal gripped the country, and she distinguished herself through a number of exclusive stories.

In 1974 Thomas became UPI's White House bureau chief, the first woman to hold such a position for a wire service. This was one of a number of firsts for Thomas as a woman reporter, starting in 1959 when she and some female colleagues forced the then all-male National Press Club to allow them to attend an address to the group by Soviet premier Nikita Khrushchev (Khrushchev, Nikita Sergeyevich). When the National Press Club finally opened its membership to women in 1971, Thomas became its first female officer. In 1975 the Gridiron Club, Washington's most exclusive press organization, invited her to become its first female member, and she became its president in 1993. As the senior wire-service correspondent at the White House, Thomas was known to television viewers as the reporter whose dignified “Thank you, Mr. President” signaled the end of White House press conferences. Her memoir, Dateline: White House, was published in 1975.