Possible Clues:

• Monologuist Mort
• Mort on the cover of 'Seriously Funny: The Rebel Comedians of the 1950s and 1960s'
• First-ever comedian to appear on the cover of Time
• He quipped 'Washington couldn't tell a lie, Nixon couldn't tell the truth, and Reagan can't tell the difference'
• Stand-up pioneer
• Sardonic Mort
• Satirist who said 'If you were the only person left on the planet, I would have to attack you. That's my job'
• Satiric comic Mort
• Early and influential stand-up comedian Mort who said, 'Liberals feel unworthy of their possessions. Conservatives feel they deserve everything they've stolen' haha I feel that
• Pioneering stand-up comedian