Donald Trump’s advisers confided they are worried that a rally slated to take place outside the Miami courthouse during the former president’s arraignment Tuesday could explode into violence and be a “disaster.”

“Inside of this event, there is going to be a disaster,” a Trump aide anonymously told The Daily Beast. “There are going to be people that come out that don’t want to be peaceful.”

The same confidant added: “You get the fanatics coming out.”

The demonstration outside the US District Court of the Southern District of Florida is being put together by longtime Trump ally Roger Stone and far-right activist Laura Loomer.

A veteran adviser to the ex-commander-in-chief has expressed misgivings about the involvement of those two controversial figures in the rally.

“When have they had a good idea?” the aide remarked.

Trump, 76, is expected to plead not guilty to 37 felony counts related to his alleged mishandling of classified documents during his arraignment scheduled for 3 p.m.