Recent polling shows Democrat Marni von Wilpert widening her advantage over Republican Jim Desmond in California's 48th Congressional District, reaching a 9-point lead among likely voters as early voting begins. Redistricting after the prior cycle shifted the open seat—vacated by retiring Rep. Darrell Issa—toward a modest Democratic registration edge, while surveys indicate Donald Trump's approval has fallen sharply in the district amid broader national trends favoring Democrats in competitive House races. Von Wilpert, a San Diego City Council member, benefits from strong fundraising and endorsements in this battleground contest. A late surge in Republican turnout, unexpected national developments, or shifts among independents could still narrow the margin before November 3.