One of these meatballs is not like the others
One of these meatballs is not quite the same...
I had to put Bloomberg's tweet in the context of a popular Sesame Street rhyme to understand its true meaning. Think about it. This tweet was released during the the Democratic debate for the front running Democratic candidates for President. So, if you think of them as "meatballs", one of them is not quite the same. How? He's not there, on stage, at the debate...
See? Simple when you put it in context