California Rep. Doug LaMalfa’s Cause of Death Revealed After He Died Suddenly at 65 During Redistricting Battle

Doug LaMalfa’s cause of death has been confirmed one month after the Republican congressman died suddenly amid a contentious redistricting fight in California.

LaMalfa, who represented California’s 1st Congressional District, died Jan. 6 at age 65. The Butte County Sheriff’s Office previously said he experienced a medical emergency at home on Jan. 5 and later died at a hospital during emergency surgery. Officials also said an autopsy and coroner’s investigation would be conducted.

The Butte County Sheriff’s Office later said his cause of death was determined to be complications from an aortic dissection. Cardiomegaly, or an enlarged heart, was listed as another significant condition. His death was ruled natural.

An aortic dissection is a rare, life-threatening condition that occurs when a tear forms in the inner layer of the aorta, allowing blood to surge between layers of the vessel wall. This can reduce blood flow to organs and tissues or cause the aorta to rupture.

Before Congress recessed for the holiday break, LaMalfa was reported to have appeared in good spirits. The House reconvened on Jan. 6.

During a House Republican policy retreat that day, President Donald Trump spoke about LaMalfa’s passing and offered condolences to his family. He highlighted LaMalfa’s work on Western issues, including California water policy, and described him as a strong advocate for his constituents.

LaMalfa is survived by his wife, Jill, their four children, and a new grandchild.

At the time of his death, LaMalfa was caught up in California’s redistricting efforts. In November, voters approved Proposition 50, a measure aimed at reducing the number of conservative congressional districts in the state ahead of the 2026 midterm elections. The proposal followed similar efforts in some Republican-led states to redraw maps affecting Democratic-leaning seats.

LaMalfa was one of five Republican House members in California whose districts were targeted by the new maps, setting up a difficult reelection path. Before his death, he had said he intended to run again.

His passing also created a political challenge for House Republicans, who have been operating with a narrow majority in Congress. A special election to fill his seat for the remainder of the term has been scheduled for Aug. 4.