A liberal group that backs "The Squad" of Rep. Alexandria Ocasio-Cortez and other liberal freshman lawmakers has been wreaking havoc among the Democratic Party in the House of Representatives.

Justice Democrats, a political action committee founded by Ocasio-Cortez's chief of staff Saikat Chakrabarti, has been backing several liberal candidates to run in primary races against Democratic incumbents, a fact that has alarmed the Congressional Black Caucus, among others.

During a panel discussion at the Netroots Nation convention in Philadelphia, Rep. Ayanna Pressley took a shot at the CBC. "I don’t want to bring a chair to an old table. This is the time to shake the table. This is the time to redefine that table. Because if you're going to come to this table, all of you who have aspirations of running for office," the Massachusetts Democrat said on Saturday. "If you’re not prepared to come to that table and represent that voice, don’t come, because we don’t need any more brown faces that don’t want to be a brown voice."