1. The investigation into pipe bombs sent to CNN and several prominent critics of President Trump is shifting to southern Florida. The authorities believe that a number of the explosive devices were mailed from the area, our reporters learned.

In all, 10 packages have been discovered since Monday, all bearing the return address of Debbie Wasserman Schultz, a Democratic congresswoman from Florida and former chairwoman of the Democratic National Committee.

Devices addressed to former Vice President Joe Biden and the actor Robert De Niro, were intercepted by law enforcement officials earlier in the day. Above, a post office in Wilmington, Del.