Trump did not provide any timing on when Alexander is expected to be released.
The White House said on Sunday that it reached a trade deal with China as the two countries negotiated for a second day in Switzerland. China has yet to comment on Sunday's talks.
"We’re confident that the deal we struck with our Chinese partners will help us to work toward resolving that national emergency,” U.S. Trade Representative Jamieson Greer told reporters in Geneva. But Treasury Secretary Scott Bessent said "substantial progress" had been made but stopped short of touting a full deal.
On Thursday, President Donald Trump announced a trade deal with the United Kingdom -- the first in what the White House said it hopes will be a flurry of agreements while the reciprocal tariff pause is in effect. With UK Prime Minister Keir Starmer on speaker phone in the Oval Office, the leaders conceded that they are still working out the details of the agreement.
Trump briefly talked about the Indian attack on Pakistan during a swearing-in ceremony for Steve Witkoff at the White House on Tuesday.
"I guess people knew something was going to happen based on a little bit of the past. They've been fighting for a long time," he said.
"I just hope it ends very quickly," Trump added.
At a "FIFA Task Force Meeting" in the White House's East Room Tuesday, Trump said he had a "great" meeting with Canadian Prime Minister Mark Carney and said that the United States' relationship with Canada and Mexico were good ahead of the 2026 FIFA World Cup.
The US, Canada and Mexico are co-hosts of the 2026 FIFA World Cup. When asked about tensions and problems with a joint partnership, the president brushed aside any potential disagreements despite his ongoing tariffs with the two countries.
"No, I don't see any tension in that. We get along very well with both. It just got to pay a little more money, you know. They're just getting away with things that they shouldn't be, and they understand," Trump said.
Veterans Affairs Secretary Doug Collins gave his first testimony on Capitol Hill since his confirmation in early February, answering at-times heated questions from Democrats on the Senate Veterans' Affairs Committee.
Several Democrats took aim at the 15% staff reduction Collins proposed in February via a video announcement.
"If you fire the people who have been hired in the last five years, you will be firing physicians, nurses, surgeons, counselors, workers who are front line. You cannot slash and trash the VA without eliminating those essential positions, which provide access and mobility of healthcare. It simply cannot be done," Democratic Sen. Richard Blumenthal said.
Collins responded, claiming the number is a target that has not yet been decided on or implemented.
"There's verbiage being said from the dais that I would like to say, as I have said already, that there is a goal of looking at a 15% reduction stated on several occasions. Already saying we're going to fire 83,000 employees -- that is wrong," he said.
Collins said the department's official number of staff reductions implemented so far is roughly 1,000.
-ABC News' Nathan Luna
Transportation Secretary Sean Duffy spoke with reporters Tuesday about the issues affecting Newark Airport, which has been hit with various issues and delays because of a shortage of air traffic controllers.
Duffy blamed the Biden administration for not investing in the air facilities, particularly the Philadelphia facility that manages the flights out of Newark.
"These facilities have to operate as we're building new radar, fiber, radios, sensors, so that choreography is going to be challenging for us," he said.
Duffy said Newark is safe for flying despite the issues it has faced and vowed to get more air traffic controllers hired.
"We think we can supercharge our air traffic controllers through the academy. That takes time," he said.
