Sahl's popularity "mushroomed like an Atomic cloud during the 50s," says filmmaker Robert B. Weide, adding, "Simply put, Mort Sahl reinvented stand-up comedy." Time magazine in 1960 published a cover story about him and his rise to fame, in which they described him as "the best of the New Comedians [and] the first notable American political satirist since Will Rogers." Along with his nightclub performances, he appeared in some films and on television shows, including his network debut on The NBC Comedy Hour in May 1956.
They valued the fact that he stayed current and took material from major newspapers and magazines. He kept his material fresh, wrote few notes, and entertained his audiences by presenting otherwise serious news with his brand of humor. He was not fond of television news, however, which he blamed in 1960 for "spoon-feeding" the public, and was therefore responsible for the "corruption and ignorance that may sink this country."
Sahl's humor is based on current events, especially politics, which led Milton Berle to describe him as "one of the greatest political satirists of all time." His trademark persona is to enter the stage with a newspaper in hand, casually dressed in a V-neck sweater. He would often recite some news stories combined with satire. He was dubbed "Will Rogers with fangs" by Time magazine in 1960.