Trump 2nd term live updates: Trump defends tariffs, declines comment on Ukraine aid

During a hastily arranged Cabinet meeting on Thursday at the White House, Elon Musk clashed with top Cabinet officials -- particularly Secretary of State Marco Rubio -- over the way Rubio has so far approached his management of the department he oversees, according to multiple sources with knowledge of the meeting.

Most Cabinet members around the table were observers, and didn't weigh in on the spat between Musk and Rubio, which was first reported by the New York Times. Musk accused Rubio of not firing anyone in his department, and Rubio said that was not true, given the agency had more than 1,000 employees take buyouts, sources told ABC News.

Trump observed the back and forth before interjecting and telling Rubio he was doing a good job. ABC News has reached out to the State Department for comment.

Trump was asked about the alleged clash during an event in the Oval Office on Friday. He denied it, saying "there is no clash," that Rubio and Musk "get along fantastically well" and that "they're both doing a fantastic job."

-ABC News' Rachel Scott, Katherine Faulders and Will Steakin

The Trump administration will be detaining families with children at two South Texas detention facilities, a DHS spokesperson told ABC News Friday, restarting a practice that the Biden administration sought to restrict.

The Trump administration plans to hold families at the detention centers in Karnes City and Dilley in Texas.

"The best option for illegal aliens is to self deport. If they leave now, they may still have an opportunity to return and live the American dream,” DHS Spokeswoman Tricia McLaughlin said in a statement.

During the first Trump administration, hundreds of families who came across the southern border were separated under the zero-tolerance policy. One of the officials who helped implement that policy was now Border Czar Tom Homan, who in recent months has said that as an alternative to family separation, “families can be deported together.”

-ABC News' Armando Garcia

Some 4,000 Defense Department personnel have begun receiving termination notices from their employers, according to a U.S. official.

Last month, a department statement said that 5,400 employees might be affected in a first wave of job dismissals that could reach 5% to 8% of the civilian workforce of 878,000 employees. The U.S. official did not have an explanation for the discrepancy in the numbers.

Individual DOD agencies are reaching out to their own employees affected by the terminations, one reason why the notices are all not going out at once.

According to the official, 31,000 civilian employees submitted a resignation request per the Office of Personnel Management email.

A review of those employees is underway, and there are some for whom their request will be denied because they have been exempted. So far, 11,000 of those who submitted resignations have had their requests accepted. The 31,000 affected employees is equal to 3.5% of the total DOD civilian workforce.

-ABC News' Luis Martinez

Homeland Security Secretary Kristi Noem discussed security during next year's World Cup and ensured all of the games would be safe and secure.

Noem said the agency would be setting up partnerships with local and worldwide partners.

"Streamlining those communications, it'll be a wonderful event, and everybody will be safe and fun," she said.