President Donald Trump threatened the European Union with 50 percent tariffs. More tariff turmoil: Trump is also waging war on Apple, threatening 25 percent tariffs if it doesn’t shift iPhone production to the United States — that could mean price hikes. Stock markets fell slightly with the news.

The battle between Harvard and the Trump administration is a long and windy one. Here's what background you need to know.

China will safeguard the legitimate rights and interests of its overseas students and scholars, the foreign ministry said on Friday, responding to the Trump administration's decision to block Harvard University from enrolling foreign students.

Some of Harvard’s sports teams would be virtually wiped out by a Trump administration decision that would make the Ivy League school ineligible for international student visas.

An attempt to bar the school from hosting international students is just the latest escalation of an ongoing back-and-forth over Harvard's ideological future.

President Donald Trump and U.S. Attorney General Pam Bondi gesture as Sen. Ashley Moody (R-FL) looks on during a ceremony honoring the 2025 NCAA men’s basketball champion Florida Gators at the White House, May 21, 2025, in Washington, D.C.

The twin threats, delivered via social media, roiled global markets after weeks of de-escalation had provided some reprieve.