At Trump's Tucson rally, things turned violent again.

Warning: The video below is violent and real.

Hard to watch pic.twitter.com/mXUheiiHRu

— Aaron Blake (@AaronBlake) March 20, 2016

Very disturbing. That's a straight-up sucker punch, followed up by a beating right there.

Then there's the tale of Corey Lewandowski, Trump's campaign manager and head thug, apparently pulling a protester by the collar.

Here is Donald Trump's campaign manager in the Tucson crowd grabbing the collar of a protester. pic.twitter.com/JZ9RntWlHY

— Jacqueline Alemany (@JaxAlemany) March 19, 2016

At this point, it is as if these violent incidents are baked into any rally where Donald Trump is appearing, almost as if the violence was staged.

Except it isn't. It's real, and it's going to get much, much worse.