Marni von Wilpert holds a commanding lead in the CA-48 House race primarily because redistricting under Proposition 50 shifted the open seat from a Republican stronghold—where Donald Trump won by double digits in 2024—to one where Kamala Harris would have carried it by several points, prompting incumbent Darrell Issa to retire. Recent polling shows von Wilpert expanding her advantage to 47-38 percent among likely voters as early voting begins, fueled by Democratic gains in competitive districts nationwide and low approval for the Trump administration in the district. Desmond, a San Diego County supervisor, maintains local name recognition and emphasizes constituent services, but faces headwinds in a battleground rated Lean Democratic by multiple forecasters. Late developments such as turnout surges among Republican voters, shifts on affordability or border issues, or national events could still narrow the gap before November 3.