A large group of protesters derailed Joe Biden’s rally in Detroit on Monday after some held up a giant “NAFTA kills jobs” banner.

NAFTA protestors at the Biden event. pic.twitter.com/CZ1KUZzTJX

— Adam Brewster (@adam_brew) March 10, 2020

As the group help up two different banners, Biden demanded to know, “Are you with Donald Trump?” as the crowd booed.

Protesters disrupt Biden rally in Detroit a short time ago. pic.twitter.com/ZVNBUnaCJr

— Mid-Michigan NOW (@midmichigannow) March 10, 2020

The banners also read, “NAFTA killed our jobs” and “Biden betrayed workers,” referring to the 1990s trade deal with Mexico and Canada that shipped thousands of jobs out of America.

Biden demanded his supporters “let them go,” but the banners were ripped down anyway.

“The Bernie bros are here,” Biden announced.

Another angle shows two police officers escorting the protester out by force:

The first of several protesters is tossed out of @Joe Biden campaign rally in Detroit… pic.twitter.com/aAPGvQRNkT

— Michael Mathes (@MichaelMathes) March 10, 2020

The rally descended into chaos as Biden attempted to restore order.