"Judge Aileen Cannon ruled that the entire case should be thrown out because the appointment of the special counsel who brought the case, Jack Smith, had violated the Constitution."

The NYT reports.

In a stunning ruling, the judge, Aileen M. Cannon, found that because Mr. Smith had not been named to the post of special counsel by the president or confirmed by the Senate, his appointment was in violation of the appointments clause of the Constitution....

This will be appealed, but in the end Trump will win. In any event, he has won more time. 

ADDED: Here's the opinion. Excerpt:

The bottom line is this : The Appointments Clause is a critical constitutional restriction stemming from the separation of powers, and it gives to Congress a considered role in determining the propriety of vesting appointment power for inferior officers. The Special Counsel's position effectively usurps that important legislative authority, transferring it to a Head of Department, and in the process threatening the structural liberty inherent in the separation of powers. If the political branches wish to grant the Attorney General power to appoint Special Counsel Smith to investigate and prosecute this action with the full powers of a United States Attorney, there is a valid means by which to do so. He can be appointed and confirmed through the default method prescribed in the Appointments Clause, as Congress has directed for United States Attorneys throughout American history, see 28 U.S.C. § 541, or Congress can authorize his appointment through enactment of positive statutory law consistent with the Appointments Clause.