I've read some Aristotle but don't recall that. I'd like to read it -- can you post the name of the work where Aristotle wrote that? I'll then get it from the library. Thanks!
I'm not certain, but it may be in The Politics, Book V, xi. Methods of Preserving Monarchies, with Particular Reference to Tyranny, pp. 343-351 (Penguin edition). I distinctly remember reading something regarding tyrants posing as the champions of slaves and women, but it's possible I confused what Aristotle actually wrote with a modern writer's interpretation of what he wrote. Aristotle made fascinating observations about the nature of tyrants which still ring true today. Human nature hasn't changed in 2300 years.
I did find the complete Politics on the web:
http://classics.mit.edu/Aristotle/politics.html
A different translation (Benjamin Jowett) of the book I have.