President Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE said Tuesday that first lady Melania Trump Melania TrumpMelania Trump: Ginsburg's 'spirit will live on in all she has inspired' The Hill's 12:30 Report - Presented by Facebook - You might want to download TikTok now Warning label added to Trump tweet over potential mail-in voting disinformation MORE “is doing really well” as she recovers from kidney surgery.

“Our great First Lady is doing really well. Will be leaving hospital in 2 or 3 days. Thank you for so much love and support!” Trump tweeted.

Our great First Lady is doing really well. Will be leaving hospital in 2 or 3 days. Thank you for so much love and support! — Donald J. Trump (@realDonaldTrump) May 15, 2018

The first lady is recovering at Walter Reed National Military Medical Center outside of Washington after she underwent an embolization procedure on Monday for a “benign kidney condition.”

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The White House said the procedure was successful, and there were no complications.

On Tuesday afternoon, Trump led off his speech at the annual Peace Officers Memorial Service on Capitol Hill by commenting on the first lady's status.

“Melania is in the hospital doing really well,” Trump said. “She’s watching us right now.”

He also praised the medical staff at Walter Reed.

“And I want to thank the incredible doctors,” he said. “They did a fantastic job. So thank you, and she sends her love.”

The president visited the first lady at the hospital late Monday afternoon.

CNN’s Dr. Sanjay Gupta said Monday that while it was unclear what exactly the Melania Trump's medical procedure was, an embolization procedure is typically done for cancer treatment.

"Although it’s very clear in this [White House] statement that this was a benign condition,” Gupta said. “So it doesn’t sound like it’s any type of cancer.”

“Sometimes thyroids, or cysts, or something like that can be treated as well,” Gupta said.

--Updated at 11:51 a.m.