While the 2020 Democratic frontrunner’s quip was likely a reference to the two contenders’ sparring during the first primary debate last month, many on social media condemned the comment as “sexist” and “diminishing.”

“Kid? She’s a grown woman Biden,” wrote BAFTA-award winning television writer Dominic Mitchell.

“Come on, man. Don’t be such a sexist wuss straight out the 1950s,” Mitchell said.