In the national struggle over U.S. House control, perhaps no politician has more at stake than the California governor, who has emerged as the leading Democratic adversary to President Donald Trump in what many see as a lightly masked trial run for his own future White House bid.

Gavin Newsom’s plan to temporarily redraw California’s congressional districts has more support than opposition — but with many voters undecided, the measure’s prospects remain uncertain, a new poll found.