Elizabeth Warren calls it as she sees it.

Donald J. Trump, says the senior U.S. senator from Massachusetts, is a “thin-skinned racist bully.”

So the attack continues. It will continue through the rest of this political campaign as Trump runs for the presidency against his certain Democratic Party opponent, Hillary Rodham Clinton.

Trump’s camp needs to worry about their guy.

The presumptive Republican Party presidential nominee has demonstrated time and again an inability to answer criticism of his statements and what passes for “policy” without resorting to name-calling and insults.

Take his standard-fare response to Warren’s criticism. He keeps referring to her as “Pocahontas.” Why? It’s because Warren claims to have some Native American ancestry in her background.

When the criticism comes from Clinton, Trump responds with “Crooked Hillary” barbs. Former GOP foes Ted Cruz became “Lyin’ Ted,” Marco Rubio became “Little Marco,” and Jeb Bush became “Low Energy Jeb.”

Trump has labeled the media as “sleazy,” “dishonest,” “pathetic,” and “phony.” Why? Because the media have shown the temerity to report on negative elements of Trump’s past.

I’m sure someone within Trump’s inner circle — if he’s actually got one — will need to inform him of this truth.

“Donald, it’s not going to get any easier from this day forward. In fact, dude, it’s going to get even rougher. The more insults and pejorative labels you sling at your critics, the more they’re going to come back at you.

“It’s long past time, Donald, for you to start arguing policy differences with Hillary.

“However, first things first. You’ve got to come with a set of policies you can call your own.”

Will he heed that advice?

I’d wager — if I were a betting man — he’ll ignore it … at enormous political peril.