Democrats in Congress are making election reform their top legislative priority, and we’ve criticized it as a majority protection act. To understand why, consider that Democrats are trying to do for the country what they’ve done with election laws in California.

The Golden State is where Republican candidates went to bed on election night in November with leads in most of their competitive House races, only to lose in the ensuing weeks of vote counting. In Orange County, Young Kim was poised to become the first Korean-American...