Arizona Democratic Rep. Raúl M. Grijalva died Thursday at age 77 due to complications from cancer treatments, his office said.
Since he announced a lung cancer diagnosis in April, Grijalva has spent little time in Washington while he sought treatment for the disease over many months, saying last fall that he believed he was mostly recovered.
He was a first-generation American and longtime progressive leader known for efforts to fight climate change, conserve natural areas, protect biodiversity and safeguard sacred sites and tribal lands.