Melania Trump's spokesperson said the first lady "deserves personal privacy" as she recovers from kidney surgery.
"Heading over to Walter Reed Medical Center to see our great First Lady, Melania", Trump tweeted. Vice President Mike Pence, however, described the procedure as "long planned" as he opened a speech Monday night in Washington.
"I want to start by saying that Melania is in the hospital doing really well".
She is the first U.S. first lady to undergo such a serious medical procedure while in the White House since Nancy Reagan had a mastectomy in October 1987. They did a fantastic job.
At the Capitol later, where he joined Republican senators at their weekly lunch, Trump reiterated that his wife is "really doing well".
Earlier Tuesday, the president tweeted that she was "doing really well" and would be "leaving the hospital in 2 or 3 days".
On Monday, Grisham announced the procedure upon its completion in a statement, writing, "This morning, First Lady Melania Trump underwent an embolization procedure to treat a benign kidney condition". "The procedure was successful and there were no complications", Grisham said.
They're not common but tend to occur in middle-aged women and can cause problematic bleeding if they become large enough, said Dr. Keith Kowalczyk of MedStar Georgetown University Hospital. Mrs. Trump is 48.
An embolisation is a minimally invasive treatment that blocks one or more blood vessels or abnormal vascular channels. Many times, embolization patients go home the same day or the next. They have a 12-year-old son, Barron. Trump outlined her new initiatives, known as the Be Best program, as first lady during the event. Separately, a former Playboy model has revived her allegations of a 10-month affair with Trump, also in 2006.
"The First Lady is in good spirits and she is resting". She and Barron moved to the White House last June.