Voters on Tuesday head to the polls for California's pivotal primary, which could help determine whether Democrats will gain control of the House in the November midterms. The Golden State is home to 10 of the most competitive House races in the nation, virtually all currently held by Republicans. The state is a key to the Democratic Party’s plan to net the 23 seats it needs to flip the House majority in November. But uncertainty abounds thanks to the state's "jungle primary" system, where the top two vote-getters advance to the general election regardless of party affiliation. The unusual dynamic...
