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California Senate President Pro Tem Mike McGuire has officially launched his challenge to longtime Republican Rep. Doug LaMalfa in a congressional district drastically redrawn by Proposition 50.

The Santa Rosa Democrat, who will hit his 12-year term limit in the Legislature next year, was widely viewed once the new maps were drawn as a prospective challenger to LaMalfa, a rice farmer from Oroville who has represented the North State in Congress since 2013.

LaMalfa’s current district stretches from Siskiyou County and much of the Oregon-California border down through rural Shasta and Sutter Counties.

Under the new voter-approved Prop. 50 maps, the district shifts south out of Modoc County and jogs

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