Sen. Bernie Sanders (I-VT) contradicted Senate Minority Leader Chuck Schumer’s (D-NY) insistence that his caucus is unified, deepening a divide that is growing between the establishment and progressive wings of the Democratic Party.

During a CNN interview Wednesday, Sanders, a progressive ringleader who caucuses with Democrats, was pressed on Schumer’s remarks that the party is “totally united.” The Vermont senator expressed skepticism at the leader’s claim, suggesting that “the old Democratic establishment” doesn’t have a clear agenda, is controlled by corrupt special interest groups, and lacks the fire needed to win elections that progressives bring to the table.