There's another twist in the federal corruption trial of U.S.

Senator Bob Menendez.

It now faces a possible delay.

The U.S. Department of Justice today sent a letter to the federal judge presiding over the case, stating prosecutors agree with a recent request by his wife, Nadine Menendez, to delay the trial, which was slated to start May 6 by at least two months.

This after her lawyers asked for an adjournment because she was recently diagnosed with a serious medical condition.

Lawyers aren't disclosing details about the condition, but said it would require surgery within 4 to 6 weeks and possibly significant follow up and recovery treatment.

In a letter to the judge, U.S. prosecutors wrote they, quote, Take seriously the unexpected medical development, calling for a status conference on June 4th to check in on her health, but also denied the request for an indefinite adjournment.

A delay will also impact her husband's trial.

And it's not the first time the embattled senator has asked for a postponement since being indicted for a bribery scheme last September.

It's now up to the judge to decide whether the trial should be postponed until later this summer.