Rep. Alexandria Ocasio-Cortez, D-N.Y., speaks during a rally for Democratic presidential candidate Sen. Bernie Sanders, I-Vt., in Iowa last month. She has announced a new PAC to back progressive congressional candidates.

Rep. Alexandria Ocasio-Cortez, D-N.Y., speaks during a rally for Democratic presidential candidate Sen. Bernie Sanders, I-Vt., in Iowa last month. She has announced a new PAC to back progressive congressional candidates.