Tony Snow, seen here conducting his first press briefing on May 16, 2006, described his stint at the White House as 'the most exciting, intellectually aerobic job I'm ever going to have.' (Associated Press)

Tony Snow, a conservative writer and commentator who cheerfully sparred with reporters in the White House briefing room during a stint as U.S. President George W. Bush's press secretary, died early Saturday of colon cancer. Snow was 53 years old.

"Laura and I are deeply saddened by the death of our dear friend, Tony Snow," Bush said in a statement. "The Snow family has lost a beloved husband and father. And America has lost a devoted public servant and a man of character."

Snow, who served as the first host of the television news program Fox News Sunday from 1996 to 2003, would later say that in the Bush administration he was enjoying "the most exciting, intellectually aerobic job I'm ever going to have."

Snow was working for Fox News Channel and Fox News Radio when he replaced Scott McClellan as press secretary in May 2006 during a White House shakeup. Unlike McClellan, who came to define caution and bland delivery from the White House podium, Snow was never shy about playing to the cameras.

With a quick-from-the-lip repartee, broadcaster's good looks and a relentlessly bright outlook — if not always a command of the facts — he became a popular figure around the country to the delight of his White House bosses.

He served just 17 months as press secretary, a tenure interrupted by his second bout with cancer. In 2005, doctors had removed his colon and he began six months of chemotherapy. In March 2007, a cancerous growth was removed from his abdominal area and he spent five weeks recuperating before returning to the White House.

He resigned as Bush's chief spokesman six months later, in September 2007, citing not his health but a need to earn more than the $168,000 US a year he was paid in the government post.

In April, he joined CNN as a commentator.

In his year and a half at the White House, Snow brought partisan zeal and the skills of a seasoned performer to the task of explaining and defending the president's policies. During daily briefings, he challenged reporters, scolded them and questioned their motives as if he were starring in a TV show broadcast live from the West Wing.

Critics suggested that Snow was turning the traditionally informational daily briefing into a personality-driven media event short on facts and long on confrontation. He was the first press secretary, by his own accounting, to travel the country raising money for Republican candidates.

Although a star in conservative politics, as a commentator he had not always been on the president's side. He once called Bush "something of an embarrassment" in conservative circles and criticized what he called Bush's "lacklustre" domestic policy.