Trump admin live updates: White House drops NASA nominee with Musk ties

In a statement Thursday morning, Secretary of State Marco Rubio said the department has notified Congress of its planned reorganization.

“The plan submitted to Congress was the result of thoughtful and deliberative work by senior Department leadership. We have taken into account feedback from lawmakers, bureaus, and long-serving employees,” Rubio said. “The reorganization plan will result in a more agile Department, better equipped to promote America’s interests and keep Americans safe across the world.”

The reorganization was first unveiled last month, but the plan includes some minor updates—including the addition of an Office of Foreign Assistance Oversight.

--ABC News' Shannon Kingston

Kevin Hassett, from the White House National Economic Council, continued to promote the administration's trade deals and responded to a court ruling that blocks some of President Donald Trump's global tariffs during an interview with FOX Business Network's "Mornings with Maria" on Thursday.

Hassett said the administration was "confident" it would win on appeal, contending fentanyl crossing the border from Mexico, Canada and China amount to an "emergency."

Hassett mentioned that the Trump administration has "three or four other ways to do it" regarding tariffs as they move forward, but still projected optimism they would prevail in court.

"There are different approaches that would take a couple of months to put these in place and using procedures that have been approved in the past or approved in the last administration, but we're not planning to pursue those right now because we're very, very confident that this really is incorrect," Hassett said.

-ABC News' Kelsey Walsh

An hour ahead of a federal hearing on Thursday over Harvard's ability to enroll international students, the acting director of the U.S. Immigration and Customs Enforcement issued a letter formally notifying the school that its Student and Exchange Visitor Program certification would be withdrawn.

The formal notice -- which provides Harvard University 30 days to respond -- said the Department of Homeland Security identified "national security concerns" related to international students and accused them of allowing antisemitism on campus.

"During a records review of Harvard University, compliance issues were identified that may result in the withdrawal of your school's certification and bar any further enrollment or education of nonimmigrant students," the notice said.

With a federal judge set to evaluate the legality of the Trump administration's actions last week revoking the school's ability to enroll international students, sources have described the letter as an effort to provide a legal justification for last week's purported revocation.

-ABC News' Peter Charalambous

The Trump administration will work to "aggressively revoke visas" for Chinese students at U.S. universities, including those with ties to the Chinese Communist Party or studying in "critical fields," Secretary of State Marco Rubio said in a statement Wednesday.

Rubio's statement said the State Department and the Department of Homeland Security would work on revoking visas.

"We will also revise visa criteria to enhance scrutiny of all future visa applications from the People’s Republic of China and Hong Kong," Rubio said.

The move is in step with the Trump administration's ongoing crackdown on student visas.

-ABC News' Shannon Kingston