There is no guarantee Democrats can prevent the Republican-powered redistricting, just as Democrats on Capitol Hill have not been able to stop Trump’s moves. But it’s a notable turn for a party that, by its own leaders’ admissions, has honored conventional rules and bypassed bare-knuckled tactics.

Former California Gov. Arnold Schwarzenegger took several years, working across the aisle with Democrats and liberal-leaning nonprofits, to create an independent “citizens” commission to