That's the question Marco Rubio said "we all need to take a step back" and ask. He adds: "Presidential candidates are now basically Twitter trolls."
That's my transcription from "State of the Union" this morning, where the moderator Jake Tapper is bearing very heavily down on the subject of the violence and anger supposedly fomented by Donald Trump.
ADDED: Here's a taste of Tapper. Note the woeful face and the dire words: