Sen. Bob Menendez revealed Thursday that his wife Nadine has cancer.

The announcement comes on day four of the New Jersey Democrat's ongoing corruption trial in Manhattan where he and his wife are both charged in a corruption scheme.

'As a result of constant press inquiries and reporters following my wife, she has asked me to disclose her medical condition,' Menendez wrote in a statement Thursday. 

'Nadine is suffering from Grade 3 breast cancer, which will require her to have mastectomy surgery. We are of course, concerned about the seriousness and advanced stage of the disease.'

'She will require follow up surgery and possibly radiation treatment. We hope and pray for the best results.' 

'We ask the press and the public to give her the time, space and privacy to deal with this challenging health condition as she undergoes surgery and recovery,' the statement said.

The shocking revelation comes one day after Menendez's legal team threw Nadine under the bus for storing gold bars in the couple's home without the lawmaker's knowledge. 

On Wednesday, the Democrat's attorney Avi Weitzman claimed during opening statements that the 'gold bars were found in a locked closet' and that it wasn't the lawmaker's but 'it is Nadine’s closet.'

He then pulled out a photo of the closet and highlighted how it was filled with Nadine's clothes.

'The senator did not know the gold bars were there,' Weitzman told the jury. 

Menendez, his wife Nadine and two New Jersey businessmen - Wael Hana and Fred Daibes - have pleaded not guilty to allegedly taking part in a bribery scheme featuring gold bars, hundreds of thousands of dollars in cash payments and a luxury Mercedes-Benz convertible.

Federal prosecutors, however, claim Menendez was directly involved in the bribery scheme.

'This case is about a public official who put greed first. Who put his power up for sale,' US Attorney Lara Pomerantz said Wednesday. 

'This was not politics as usual. This was politics for profit.' 

'He was powerful. He was also corrupt. And what was his price? Gold bars,' Pomerantz said. 

'The scheme filled his pockets, it filled his wife’s pockets, and it fed their greed.'

'Menendez abused his positions to feed his own greed and to keep his wife happy,' the federal prosecutor stated. 

Pomerantz even claimed that Menendez deployed his wife to handle communications in the bribery scheme.

'He used Nadine as his go-between to deliver messages to and from the people paying bribes.'

Judge Sidney H. Stein, who is presiding over the case, told potential jurors Tuesday that renowned lawmakers, former white house officials and even one man considered to be in the running for a Trump vice presidential slot could all be called in to testify in the high-profile corruption case.  

The list of potential witnesses given out by Stein included: Sens. Marsha Blackburn, R-Tenn., Lindsey Graham, R-S.C., Tim Scott, R-S.C., Cory Booker, D-N.J., Tim Kaine, D-Va., Chris Coons, D-Del., Patrick Leahy, D-Vt., Kristen Sinema, I-Ariz., Chris Van Hollen, D-Md.

It also includes former Secretary of State Mike Pompeo, former Treasury Sec. Steve Mnuchin, former senior advisor to President Obama David Axelrod and Rep. Dan Goldman, D-N.Y.

The list of potential witnesses notably mentions Scott, who has been rumored to be a top pick for Donald Trump's 2024 running mate.

It also lists two of the former president's closest advisors: Mnuchin and Pompeo.