Rep. Alexandria Ocasio-Cortez, D-N.Y., spoke out Saturday against a Democratic Congressional Campaign Committee plan to help incumbents fight off challengers in the Democratic primary.

“The @DCCC’s new rule to blacklist+boycott anyone who does business w/ primary challengers is extremely divisive & harmful to the party,” Ocasio-Cortez said on Twitter. “My recommendation, if you’re a small-dollar donor: pause your donations to DCCC & give directly to swing candidates instead.”