For months, companies with downtown real-estate interests had been lobbying to stop the trial.
But the judge has refused to allow the threats to stop the trial.
He changed his plea today at the Old Bailey, after legal challenges to stop the trial failed.
Mr. Khodorkovsky's parents hoped that Mr. Obama's interest would prompt Mr. Medvedev to stop the trial and free their son.
"There's nothing left before Judge Kramer that could stop the trial at this point," Mr. Schreiner said.
Health problems could stop the trial if his condition does not improve or his competence comes into question.
Ren Benjamin, an analyst with Rodman & Renshaw, said the F.D.A. action was not surprising and was likely to delay rather than stop the trial.
The only ethical thing to do in that case would be to stop the trial and give everyone the superior drug.
Ms. O'Connor, the spokeswoman for Eutelsat, denied that content had played any role in the decision to stop the trial transmission.
Its preliminary results were announced days after an independent monitoring board determined that the benefits of CT scans were strong enough to stop the trial.
At this moment, based on the slow recruitment rate, the decision to stop the trial was made.
