Question

What does the saying “flea on the back of a Rottweiler mean”? Why does the speaker use this phrase?
From Khan Academy: The Monroe Doctrine

Answer 1

Explanation:

The Monroe Doctrine means what it has meant since President Monroe and John Quincy Adams enunciated it, and that is that we would oppose a foreign power extending its power to the Western Hemisphere [sic], and that is why we oppose what is happening in Cuba today. That is why we have cut off our trade

Answer 2

they use the phrase to catch readers attention