CEDAR RAPIDS, Iowa — Sen. Bernie Sanders took aim at Democratic primary rival Joe Biden at the Iowa Democratic Party Hall of Fame forum Sunday, declaring that a “middle ground” strategy would change nothing.

“Now I understand there are well-intentioned candidates who believe the best way forward is a middle ground strategy that antagonizes no one, that stands up to nobody, and that changes nothing,” Sanders said. “In my view, that approach is not just bad policy, but it is a failed political strategy that I fear could end up with the reelection of Donald Trump.”