What Arab leader did "Newsweek" liken to Chico Marx, due to his "mop of curly black hair and antic behavior"?

Answer 1

The Libyan dictator Muammar Kaddafi. Here's the relevant quote:
"But Kaddafi, with his mop of curly black hair and antic behavior, also tends to put one in mind of Chico Marx. Even his allies in the Islamic world often dismiss the erratic Libyan's behavior as odd."