Trump admin updates: White House asks court to stay order to ground deportation flights

A federal judge is requiring the head of the Office of Personnel Management (OPM) to testify on Thursday about the mass firing of probationary employees.

A group of federal unions have alleged that OPM acting director Charles Ezell lied in a sworn declaration that his office did not order the firing of probationary employees based on "performance or misconduct," prompting U.S. District Judge William Alsup to order Monday night Ezell to testify in person and under oath.

"The problem here is that Acting Director Ezell submitted a sworn declaration in support of the defendant's position but now refuses to appear to be cross examined or to be deposed," Alsup, a Clinton appointee, wrote.

Alsup's order effectively gives the Trump administration two choices to fight the lawsuit.

If Ezell skips the hearing, Alsup said he would consider sanctioning the government and nullifying Ezell's sworn declaration about the purported legality of the mass firings, a move that would likely guarantee that the judge pauses the mass firings and potentially reinstates thousands of employees.

Alternatively, if Ezell does testify on Thursday, he's likely to face tough questions about his sworn statements related to the firing. The plaintiffs allege that on Feb. 13, Ezell convened a phone call with the heads of federal agencies to direct them to terminate thousands of federal employees and "falsely state that the terminations are for performance reasons."

-ABC News' Peter Charalambous

Canadians who are in the United States for 30 days or longer will soon have to register their information with the United States government, according to a notice obtained by ABC News.

Traditionally, Canadians who cross the northern border by land and stay for longer than 30 days do not have to register with the federal government, but the secretary of Homeland Security can unilaterally change that rule.

Those who stay for longer than 30 days will be required to apply for registration with the federal government and be fingerprinted starting on April 11, according to the rule, which is expected to be posted on the federal register Wednesday.

Canadians who stay in the U.S. for 30 days or more and were not issued evidence of registration (such as Form I-94) at entry will need to complete the new Form G-325R, according to the rule.

-ABC News' Luke Barr

As nearly a dozen House Republicans remain undecided, Vice President JD Vance urged House Republicans to get on board and support the GOP-led government funding bill, according to several members leaving the 40-minute closed-door meeting.

Vance told Republicans that the continuing resolution - which is slated for a vote in the House Tuesday afternoon - forces Democrats to take a tough vote and emphasized the importance of not shutting the government down, members told ABC News.

-ABC News' Lauren Peller

Speaker Mike Johnson was asked for his reaction as the stock market wobbles amid Trump's tariff upheaval.

Johnson said he and many of his Republican colleagues feel President Donald Trump has "already proved what he can do on the economy" during his first term before the COVID pandemic, and that he should be given a chance to let his policies play out.

"It is a shakeup and he said there is going to be a shakeup but this is what is required, in my mind, to start the process of repairing and restoring the American economy," Johnson said. "I believe this strategy is going to work ... I think you got to give it time. He's been in office just over 50 days. Give the president a chance to have his policies play out."