Earlier this week on the campaign trail, Chelsea Clinton, the daughter of Democratic presidential candidate Hillary Clinton, attacked Bernie Sanders. It turns out, a Clinton spokesman told the press, the Chelsea Clinton attack was not a planned event.

Here's how Chelsea Clinton attacked her mother's Democratic rival: "Sen. Sanders wants to dismantle Obamacare, dismantle the CHIP program, dismantle Medicare, and dismantle private insurance. I don't want to empower Republican governors to take away Medicaid, to take away health insurance for low-income and middle-income working Americans. And I think very much that's what Sen. Sanders' plan would do."

But it was not a planned line -- and signals Chelsea going rogue.

As Brian Fallon told reporters, "Her comments were spontaneous and spoke to the fact that she follows these issues closely herself and is deeply studious of the details of the candidate's policy proposals."

The Hill newspaper reported Fallon said it was not planned:

In a conference call with reporters on Wednesday, Clinton spokesman Brian Fallon defended Chelsea Clinton as a "very spirited and fierce advocate for her parents." Asked if she would continue to attack Sanders and whether she's suited for the role, Fallon called Chelsea Clinton "policy-obsessed" and said the attack lines had not been planned.

As for the truthfulness of the attack? Politifact calls it "Mostly False."