For Vinnie Walsh, 82, of Auburn, Mass., it was “the whole nine yards — the loss of decency, courtesy, compassion, democracy.” Laurae Carpenetti, 54, a physician from the Atlanta suburbs, said that Mr. Trump’s appointment of Robert F. Kennedy Jr. as his top health official was her motivating factor.

Marines transition from training to operational support in Los Angeles despite legal challenges from Governor Gavin Newsom, as officials defend deployment to protect law enforcement during protests.