Armstrong served with LaMalfa for six years in the U.S. House of Representatives from 2019 through 2024.
“Doug was a common-sense lawmaker who fought tirelessly for his fellow farmers and rural America, in addition to being a great father, husband and friend,” Armstrong said. “Kjersti and I send our prayers and sympathies to his wife, Jill, their entire family and everyone who had the honor of serving with him.”