What We're Following This Morning

‘I’ve made my decision’: President Obama will announce his nominee to the U.S. Supreme Court at 11 a.m. ET. The move is likely to set up a fight with Senate Republicans who have vowed to not consider any nominee. You can read the president’s statement here. Update: More here

A good night for Trump and Clinton: The Republican frontrunner swept Florida, Illinois, and North Carolina and was just ahead of Ted Cruz in Missouri. Marco Rubio, once viewed as the strongest candidate, suspended his campaign last night following a loss in his home state, Florida. Ohio Governor John Kasich, meanwhile, won his home state. On the Democratic side, Hillary Clinton won in Florida, Illinois, North Carolina, and Ohio, and was leading Bernie Sanders in Missouri. The losses in states in which he was expected to perform well are likely to slow Sanders’s momentum.

North Korea sentences American student: Otto Warmbier, 21, was sentenced to 15 years hard labor for trying to steal a propaganda sign from his hotel in Pyongyang. Warmbier, a student at the University of Virginia, was in the country to as part of a tour group. Update: More here

Bourses agree to merger: The London Stock Exchange and Deutsche Börse reached an agreement today on the terms of a recommended all-share merger of equals. Deutsche Börse shareholders will own 54.4 percent of the new group; LSE equity holders will get 45.6 percent. The merger, which needs regulatory approval, will create a company worth about $30 billion.

News from last night here