So far all Dems and oppose President Trump. And traded insults with him.
There is something more specific....
What else?
Yes, all oppose Trump and have traded insults with President Trump.
They all called for violence themselves to either Republicans in general or to administration members or to President Trump himself. They called for violence.
Obama was the first to say "get in their face" referring to Republicans generally (I think specifically family members at holidays)
"if they bring a knife, we bring a gun"
Hillary "no civility until Dems have power"
Biden "I like to take him behind the school and beat him"
Holder "when they go low, we kick them"
DeNiro "I just wanna punch him"
Booker "get in their faces" (this time Rep lawmakers)
Harris "Does anyone have to survive?" (Supposed joke about being stuck in an elevator with Republicans)
Waters "create a crowd, let them know they are not wanted anywhere"
Brennan "worrier about blood in the streets"