President Trump is trying to influence which colleges receive federal financial support, a practice that began around the time of World War II.

Videos, photographs and police reports released by the Santa Fe County Sheriff’s Office in New Mexico offered a look into the days before Betsy Arakawa and Mr. Hackman died.

David Hogg, a young liberal activist and now a vice chair of the Democratic National Committee, is leading an effort to unseat the party’s older lawmakers in primaries.