Alexandria Ocasio-Cortez fired back at House Speaker Nancy Pelosi who dismissed her and other progressives who voted against their chamber’s bill to send $4.6 billion in emergency aid to the U.S. southern border.

“All these people have their public whatever and their Twitter world,” Pelosi said, according to the New York Times. “But they didn’t have any following. They’re four people and that’s how many votes they got.”

“That public ‘whatever’ is called public sentiment,” Ocasio-Cortez tweeted. “And wielding the power to shift it is how we actually achieve meaningful change in this country.”

Rep. Ocasio-Cortez, D-New York, was one of four freshman House Democrats to vote against Pelosi’s border aid bill late June and was joined by Ayanna Pressley of Massachusets, Rashida Tlaib of Michigan and Ilhan Omar of Minnesota. All four women, except for Omar, traveled to the border last week to tour migrant detention facilities and decried the “inhumane conditions” of migrant women and children in the custody of U.S. Customs and Border Protection (CBP), such as unsanitary conditions, verbal abuse and threats since arriving in the country, Yahoo News reported last week.

Their visit came after Pelosi, D-Calif., pulled a House border aid bill 234-195 and passed a Senate version 305-102, with 95 Democrats and seven Republicans voting no, before the July Fourth recess. The $4.6 billion Senate bill, largely bipartisan legislation with Senators voting 84-8, included $3 billion in humanitarian aid but also expanded funding for the Department of Defense.