• In the U.S., classes resume on Monday at the Florida school where 17 people were killed in a mass shooting nearly two weeks ago. Many survivors are publicly pushing for gun control, and privately suffering through the emotional aftermath of the massacre.

A growing number of businesses are cutting ties with the National Rifle Association, the country’s chief gun lobby. President Trump remains focused on shifting the discussion to “hardening” schools by arming teachers, and expressing fury at the F.B.I. for ignoring reports that the suspect was “going to explode.”

Amid rage over revelations that a deputy took cover instead of entering the school during the shooting, the county sheriff defended his own actions as “amazing leadership.”

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• Questions are swirling over if and when President Trump might answer questions from Robert Mueller, the special counsel. His investigation seems to be racing, our correspondent writes, but toward an as-yet-undefined goal.

After the former deputy campaign chairman Rick Gates pleaded guilty to a variety of charges, speculation is rife about the nature of his cooperation with Mr. Mueller.

And new charges accuse Paul Manafort, a one-time Trump campaign chairman, of paying off prominent Europeans to serve as boosters for an autocratic Ukrainian client.

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