The Latest: Trump announces travel ban and restrictions on 19 countries

President Donald Trump has resurrected a hallmark policy of his first term, announcing that citizens of 12 countries would be banned from visiting the United States and those from seven others would face restrictions.

Meanwhile, Germany's new leader, Chancellor Friedrich Merz, is meeting Trump in Washington on Thursday as he works to keep the U.S. on board with Western support for Ukraine, help defuse trade tensions that pose a risk to Europe's biggest economy and further bolster his country's long-criticized military spending.

Here’s the latest:

Germany's new leader is meeting with Trump Washington on Thursday as he works to keep the U.S. on board with Western support for Ukraine, help defuse trade tensions that pose a risk to Europe's biggest economy and further bolster his country's long-criticized military spending.

Trump and Chancellor Friedrich Merz have spoken several times by phone, either bilaterally or with other European leaders, since Merz took office on May 6. German officials say the two leaders have started to build a "decent" relationship, with Merz wanting to avoid the antagonism that defined Trump's relationship with one of his predecessors, Angela Merkel, in the Republican president's first term.

The 69-year-old Merz is a conservative former rival of Merkel's who took over her party after she retired from politics. Merz also comes to office with an extensive business background - something that could align him with Trump.

Trump is moving to block nearly all foreign students from entering the country to attend Harvard University, his latest attempt to choke the Ivy League school from an international pipeline that accounts for a quarter of the student body.

In an executive order signed Wednesday, Trump declared that it would jeopardize national security to allow Harvard to continue hosting foreign students on its campus in Cambridge, Massachusetts.

It's a further escalation in the White House's fight with the nation's oldest and wealthiest university. A federal court in Boston blocked the Department of Homeland Security from barring international students at Harvard last week. Trump's order invokes a different legal authority.

In a statement Wednesday night, Harvard said it will "continue to protect its international students."

"This is yet another illegal retaliatory step taken by the Administration in violation of Harvard's First Amendment rights," university officials said.

Trump on Wednesday resurrected a hallmark policy of his first term, announcing that citizens of 12 countries would be banned from visiting the United States and those from seven others would face restrictions.

The ban takes effect Monday at 12:01 a.m., a cushion that may avoid the chaos that unfolded at airports nationwide when a similar measure took effect with virtually no notice in 2017. Trump, who signaled plans for a new ban upon taking office in January, appears to be on firmer ground this time after the Supreme Court sided with him.

Some, but not all, 12 countries also appeared on the list of banned countries in Trump's first term. The new ban includes Afghanistan, Myanmar, Chad, the Republic of Congo, Equatorial Guinea, Eritrea, Haiti, Iran, Libya, Somalia, Sudan and Yemen.

There will be heightened restrictions on visitors from Burundi, Cuba, Laos, Sierra Leone, Togo, Turkmenistan and Venezuela.