Trump admin live updates: Trump says Musk will 'pay the consequences' if he funds Democrats

In the latest escalation of the White House’s fight with Harvard University, President Donald Trump signed a proclamation Wednesday blocking foreign students from entering the U.S. to attend the school.

Trump invoked the Immigration and Nationality Act to prohibit the entry of noncitizens from entering the U.S. to study at Harvard for at least six months, arguing the institution is "no longer a trustworthy steward" of international students.

The proclamation also directed the secretary of state to consider revoking the visas of foreign students already in the U.S. to study at Harvard.

"I have determined that the entry of the class of foreign nationals described above is detrimental to the interests of the United States because, in my judgment, Harvard’s conduct has rendered it an unsuitable destination for foreign students and researchers," the proclamation said.

Last month, the Department of Homeland Security tried to revoke Harvard’s Student and Exchange Visitor Program last month -- which allows the school to sponsor foreign students – a federal judge issued a temporary order blocking the move.

Trump justified the sudden move Wednesday by claiming Harvard has refused to provide information about international students, has "extensive entanglements with foreign countries," and has discriminated in their admissions practices. The proclamation also noted that crime rates have "drastically risen" at the school and requires the government to probe the potential misconduct of foreign students.

"These concerns have compelled the Federal Government to conclude that Harvard University is no longer a trustworthy steward of international student and exchange visitor programs," the proclamation said.

A federal appeals court on Wednesday denied a request from President Donald Trump's administration to lift a lower court’s order that blocked the president’s efforts to allegedly dismantle the Department of Education.

A three-judge panel on the First Circuit Court of Appeals found “no basis on which to conclude” a federal judge erred when he issued a preliminary injunction last month blocking the effort to lay off half of the Department of Education’s employees.

“What is at stake in this case, the District Court found, was whether a nearly half-century-old cabinet department would be permitted to carry out its statutorily assigned functions or prevented from doing so by a mass termination of employees aimed at implementing the effective closure of that department,” the judges wrote in the order.

The court said there is “no force” to the Trump administration’s contention that the lower court’s order would cause them any irreparable injury by "undermining implementation of an important presidential policy."

Next stop, the United States Supreme Court.

-ABC News' Peter Charalambous

President Donald Trump has ordered Attorney General Pam Bondi to investigate whether former President Joe Biden's administration sought to conspire to cover up his mental state while in office.

This represents a significant escalation from the White House as it is a directive to the Justice Department to formally investigate. It goes beyond the review into Biden's last-minute pardons before leaving office

President Donald Trump signed a proclamation on Wednesday banning travel from 12 countries, citing national security concerns.

The administration is imposing full restrictions on entry into the United States from nationals of Afghanistan, Burma, Chad, the Republic of the Congo, Equatorial Guinea, Eritrea, Haiti, Iran, Libya, Somalia, Sudan and Yemen.

Additionally, Trump is imposing partial restrictions on entry from nationals of seven other countries: Burundi, Cuba, Laos, Sierra Leone, Togo, Turkmenistan and Venezuela.

"As President, I must act to protect the national security and national interest of the United States and its people. I remain committed to engaging with those countries willing to cooperate to improve information-sharing and identity-management procedures, and to address both terrorism-related and public-safety risks," Trump wrote.

-ABC News' Kelsey Walsh