While whittling down my Twitter likes (still), I came across this:
When he was elected Denver mayor in 2003, Hickenlooper hired Bennet as his chief of staff.
That would be John Hickenlooper and Michael Bennet, whose candidacies probably also count as trivia at this point, but whatever.
And yes, the Democratic primary field is large enough for one candidate to have worked for another one. Not with (there are a lot of Senators on the list already), but for.