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Elizabeth Warren got a taste of that front-runner life in Tuesday night’s CNN/New York Times debate.

Yes, I know, she’s not leading in all the polls. Joe Biden is clearly still a force to be reckoned with in the Democratic presidential race.

But there’s little question that Ms. Warren’s surge in the contest has reached a point where she has become the major obstacle to anyone seeking the nomination.

That shift hardly went unnoticed by the rest of the field. By my count, seven different candidates attacked Ms. Warren, on everything from her economic plans to her support for voluntary gun buybacks.