Live updates and the latest news as Trump seeks to boost nuclear energy; judge blocks administration from barring Harvard international students

It would take several years and cost billions of dollars to build plants in the United States to make iPhones here. If that happens, prices could skyrocket.

Estimates by the Kiel Institute for the World Economy, a German economic research institute, showed that the tariffs would lead to a 20 percent drop in exports from the European Union to the United States in the short term, as well as a more than 6 percent increase in prices in the United States.

President Trump’s surprise tariff threat against the European Union came in the midst of deepening frustration on his economic team over the 27-nation bloc’s approach to taxes, regulations and China.Trump’s advisers have privately expressed irritation to European officials that EU member nations’ differing trade priorities have slowed down the talks,

A federal judge ordered the Trump administration on Friday to facilitate the return of a Guatemalan man who said he was deported to Mexico despite fearing he would be persecuted there, after officials acknowledged making a mistake in his case.

The Trump administration sees tariff talks as a chance to pressure a rival into concessions. E.U. officials have acted as though they were dealing with an ally.

Border shelters, which have long provided lodging and meals to migrants, received a letter from FEMA that raised concerns about potential illegal activity.