"And she's doing great".
There was no advance announcement of her schedule.
White House Correspondents Dinner host is not sorry for insulting White House women.
First Lady Melania Trump made her first public appearance since her mystery operation on Wednesday when she visited the Federal Emergency Management Agency Headquarters.
She also congratulated the recipients of this year's Lincoln Medal - an annual award given to people who have exemplified the legacy of President Lincoln through their achievements and bodies of work.
"I didn't invite them", President Trump said. "Tonight reminds all of us about the power the arts have in cultivating the American voice".
Close friends of Melania Trump are said to be concerned about her since she took the decision to forgo public appearances for nearly a month after battling health issues.
He told reporters the First Lady had endured a "big operation" but was "doing great" - although she was unable to join him on the flight to Canada under her doctors' strict orders.
But why so shy about the Ford's Theatre event?
Media and internet conspiracy theories rose up as she recovered from the surgery, claiming that she had moved back to NY or was cozied up with the Obamas writing a tell-all about plastic surgery and her husband.
She also made a speech at the event, looking stunning bathed in blue light on the stage.
Trump was unseen on Monday but another email from Grisham popped up in in-boxes, this one related to one of her signature causes: fighting the opioid epidemic under the aegis of her recently announced FLOTUS agenda, Be Best.
Few details have emerged from the first lady's office.
What else might be on Trump's schedule in coming days?
"We must determine the extent of the president's leaking, its impact on the financial markets and whether Trump's friends benefited from it", said Wyden.
One royal date in her diary: She and the president will welcome Spain's King Felipe VI and Queen Letizia at the White House on June 19, according to an announcement last week from the president's press secretary, Sarah Sanders.