Analysis: The idea of the border wall, which Mr. Trump’s advisers said they initially created to remind Mr. Trump to talk tough on immigration during his campaign, has boxed in the president. He’s now struggling to find a way to please both his core supporters and conservative skeptics who see the wall as ineffective.

In Opinion: Our columnist David Leonhardt builds a detailed argument that Mr. Trump is demonstrably unfit for office and “must go,” but that a rushed impeachment could actually help him remain in office.

Here’s what else is happening

Week ahead: The British Parliament will resume debating Brexit terms and the U.S. Fed may release some clues on whether it will continue to raise interest rates.

Syria: Two Americans were caught fighting for ISIS, according to the Syrian Democratic Forces. The arrests came on the same day President Trump’s national security adviser, John Bolton, said a retreat from Syria was conditional on the defeat of the terrorist group, reversing Mr. Trump’s surprise announcement last month of withdrawing thousands of American troops from the country.

$3 million: That’s the record-breaking price a restaurant owner who calls himself the King of Tuna paid for an endangered 612-pound bluefin tuna at an auction in Tokyo’s new fish market.