California’s latest redistricting experiment has produced one of the state’s most intriguing political matchups.In the newly redrawn 6th Congressional District covering northern Sacramento suburbs and Roseville, voters this fall will choose between two politicians whose careers have been shaped by battles over public policy and the rules that govern it. Rep. Kevin Kiley (I-CA) was elected to the House as a Republican in 2022, but shed the GOP label after Proposition 50 reshaped his political landscape. Former state Sen. Richard Pan, a Democrat, is a physician-politician whose successful campaign to eliminate California’s religious exemption for school vaccinations made him a national figure.The contest has emerged as one of California’s most closely watched House races because it is likely to determine control of Congress, with House Democrats needing to net three seats in the 435-member chamber to reach a majority. Also, since it offers an early test of the political consequences of Proposition 50, the redistricting measure championed by Gov. Gavin Newsom (D-CA) and state Democrats. Voters in the nation’s most populous blue state easily approved the changes to House maps, which could expand the party’s California delegation from an already wide 43-9 edge over Republicans to a whopping 48-4 split.