Hillary Clinton slammed Sen. Bernie Sanders (I-VT) for accusing her of representing insider politics during Thursday’s Democratic presidential debate.

“Senator Sanders is the only person who would characterize me, a woman running to be the first woman president, as exemplifying the establishment,” she said.

“It’s really quite amusing to me,” Clinton continued.

The Vermont senator had drawn a contrast between his grassroots campaign and the one run by Clinton, who has received many more high-profile endorsements.

“I will absolutely admit that Secretary Clinton has the support of far more governors, more mayors, members of the House,” Sanders said. “She has the entire establishment or almost the entire establishment behind her. That’s a fact.”

The two have clashed over this issue previously on the campaign trail, with Sanders framing himself as a populist alternative to Clinton’s old-school Washington insider brand of politics.