‘He is an anti-American, anti-government extremist,’ an FBI official said, adding that he made anti-ICE comments during the arrest.
The companies are prevented from finalizing the transaction for at least 14 days.
The DOJ also wants to block the American Bar Association from deposing one of Trump’s advisers.
A petition garnering nearly 12,000 signatures helped spur opposition to the university’s plan to acquire and demolish the historic home by eminent domain.

An attorney for the brothers said that they are innocent.
The person who set off the device is now in custody, said FBI Director Kash Patel.
The current system gives many students no fixed departure date. The new rule says that after four years, a student must apply for an extension.
The alert was issued after the United States launched strikes against Iran for a ninth straight day on Sunday evening .
The couple have three other children: Ewan, Vivek, and Mirabel.
At least one ICE agent will be required to record during a vehicle stop, Tom Homan said.
U.S. diplomatic facilities inside and outside the Middle East have been targeted, the department warned.
The Public Interest Legal Foundation alleged that the state’s refusal to produce records violates federal law.
The Democratic incumbent has no challengers, but four Republicans are vying to face her. The front-runner is Rep. Andy Biggs, who has Trump’s backing.
The charge is related to a July 3 accident in Napa County.
The Pennsylvania Democrat said a House vote to end Israel aid was ‘a symbolic thing’ but that a change to the party’s platform would push him out.
Around 250,000 noncitizens were found in New Jersey, California, Nevada, and Pennsylvania, Secretary Markwayne Mullin said.
President Trump highlighted China’s meddling in U.S. elections and the declassification of documents.