Possible Clues:

• Mort from Montreal
• 'Is there anyone here I haven't offended?' comic
• Wit Mort
• Satirist who wrote jokes for J.F.K.
• Stand-up pioneer Mort
• Mirthful Mort
• Mordant monologist Mort
• Political satirist who said 'If you were the only person left on the planet, I would have to attack you. That's my job'
• Jokester Mort
• Comedian profiled in "Last Man Standing"