Trump says 3rd term isn't a joke, despite term limit

White House press secretary Karoline Leavitt was asked if the White House would hold anyone accountable for what happened and if it would potentially change its messaging on the incident.

“Well, we have never denied that this was a mistake, and the national security adviser took responsibility for that, and we have said we are making changes. We are looking into the matter to ensure it can never happen again," she said.

Asked if the White House would cooperate with any requests from Congress regarding the Signal chat, Leavitt left it open-ended.

“We haven't seen a request from Congress come through our inboxes yet, and when that does, we'll have an answer," she said.

-ABC News' Hannah Demissie

The Department of Health and Human Services confirmed on Thursday that about 10,000 full-time employees will soon lose their jobs, on top of the nearly 10,000 who have already left the agency in the last few months through buyout offers or early retirements.

That puts the total employees at around 62,000 people -- down from 82,000 at the start of the Trump administration.

"We aren't just reducing bureaucratic sprawl. We are realigning the organization with its core mission and our new priorities in reversing the chronic disease epidemic," HHS Secretary Robert F. Kennedy, Jr. said in a statement.

"This overhaul will be a win-win for taxpayers and for those that HHS serves. That's the entire American public, because our goal is to Make America Healthy Again," Kennedy said. Kennedy claimed the latest cuts would save taxpayers $1.8 billion per year.

Despite cutting nearly one-quarter of the agency, the department maintains that the restructuring won't impact "critical services."

The real-world impact of the newest round of cuts, however, remains to be seen. Already, cuts have hit top researchers at the National Institute of Health's Alzheimer's research center and disease detectives who identify new infectious diseases.

-ABC News' Cheyenne Haslett

The Department of Health and Human Services, led by Secretary Robert F. Kennedy Jr., is set to announce a major reorganization on Thursday, including the shuttering of half of its regional offices around the country, according to two sources familiar with the plans.

Roughly 10,000 jobs will be cut across the department, which oversees the Food and Drug Administration, the Centers for Disease Control and Prevention, the Centers for Medicare and Medicaid Services, and many more divisions. Five of the 10 regional offices will close.

Unions have been notified of the reduction in force plans, agency employees told ABC News.

The full details of the mass layoffs were first reported by the Wall Street Journal.

-ABC News' Cheyenne Haslett and Mike Levine

President Donald Trump is warning that he will impose “large scale tariffs” on the European Union and Canada if they work together to respond to his recently announced tariffs.

“If the European Union works with Canada in order to do economic harm to the USA, large scale Tariffs, far larger than currently planned, will be placed on them both in order to protect the best friend that each of those two countries has ever had,” Trump posted on Truth Social early Thursday morning.

The European Union has delayed its tariffs on the U.S. until mid-April.

In a statement last night, Canadian Prime Minister Mark Carney called Trump’s auto tariffs a “direct attack” and that he would meet with his cabinet on Thursday to discuss trade options.

-ABC News' Justin Gomez