Sen. Tammy Duckworth, D-Ill., added to the conversation on Sunday by suggesting that what worked in the Bronx for Ocasio-Cortez may not work nationwide.

“I don’t think you can go too far to the left and still win the Midwest,” Duckworth said on CNN’s “State of the Union.” “Coming from a midwestern state, I think you need to be able to talk to the industrial Midwest. You need to be able to listen to the people there in order to win an election nationwide.”

Ocasio-Cortez responded on Twitter not much later, touting the midwestern states that Sen. Bernie Sanders, I-Vt., won in the 2016 Democratic presidential primary.