LIMA, Peru (AP) — People poured into Peru's coastal capital, many from remote Andean regions, for a protest Thursday against President Dina Boluarte and in support of her predecessor, whose ouster last month launched deadly unrest and cast the nation into political chaos.

There was a tense calm in the streets of Lima ahead of the protest that supporters of former President Pedro Castillo hope opens a new chapter in the weeks-long movement to demand Boluarte's resignation, the dissolution of Congress, and immediate elections. Castillo, Peru's first leader from a rural Andean background, was imp...